The rain had been arguing with the workshop windows since six o'clock, and by eleven Maren Ilves had stopped pretending she was not listening.

It was a good room for listening. Third floor, above a stationery shop that had been shuttered for as long as she had rented the space, with one long worktable under a skylight streaked silver by the weather. Shelves of bone folders and tissue and jars of wheat paste, every jar labeled in a hand so neat that a client had once told her it made him want to confess things. Everything in the room had a place. Everything in it was either mended or waiting to be. That was the arrangement she had made at twenty-two, when she signed the lease: she would take the broken things and give them back whole, and no one would ask what she did with her evenings.

She had come to the trade at sixteen, apprenticed to an old bookbinder who took her on because she was the only applicant who never asked to leave early. She had not understood, then, why a girl would choose to spend her days among broken things. She understood now. A broken thing could be assessed. It had edges and causes. If you were patient, and your hands were good, you could take something that had been left behind and make it stay.

Her phone buzzed against a jar of paste. She turned it over with one finger. A message from her landlord, cheerful and punctuation-free: roof inspector Thursday morning, please clear the area under the skylight, thanks. She turned it face down again. The skylight had leaked once, years ago, a brown bloom spreading across a ceiling tile, and she had spent a full night moving paper out of the way of water. She did not intend to go through that again.

Tonight there was only one object on the table, and it was not a client's.

It lay on a sheet of blotting paper beside an empty archival box that she had bought three years ago and never used: a small book with a cloth cover gone the color of weak tea, its spine split down to the cords, one corner of the back board chewed away as though something had tried to eat it. A diary, if she was being generous. A notebook, if she wasn't. Her mother had carried it in her coat pocket everywhere, and on the morning she left, she had set it on the kitchen table under the sugar bowl, like a note that had forgotten to be one.

Sixteen years ago tonight, if you were the kind of person who kept those dates. Maren had always told herself she was not. She had counted them anyway, on trains and in queues and once, memorably, in the middle of a funeral that was not even hers, the way you count stairs in the dark.

She pulled on her cotton gloves. Then she pulled them off again, because gloves were for strangers' books, and you could not feel the paper through them, and if she was going to do this at all she was going to do it properly.

"It's a job," she told the empty room. "Board, thread, paper. Condition report first."

The room, which had heard worse lies from her, said nothing.

She slid the point of a microspatula under the front board and lifted. The book opened with a sigh, the way old books do when they are finally allowed to, and a smell reached her a moment later that made her hold very still. Not mildew. Not dust. Something cold and mineral and faintly sweet, like the inside of a shell.

The handwriting was exactly as she remembered, which was the first unkindness. Slanted, quick, with a little hook on every descender, as if each letter were reaching for the next one. Her mother had written grocery lists like that. She had written permission slips like that, and once, on the back of a school photograph, the words Look how serious. Maren swallowed and made herself read the first page instead of the memory.

Low water, the page said. Count the pages twice.

Nothing else. No date, no name. Just those six words in a deep blue-green ink, and beneath them a faint rippling of fine lines, the way sand looks when the sea has gone out and left its signature behind.

The ink had always been the wrong part. Iron gall browned and bit into the paper. Carbon sat on top of it like soot. Dye inks faded to a sulk. This was none of them. As a child she had assumed it was something spilled; as a conservator she knew that no spill dried in that pattern, and she had never tested it, which was its own kind of answer. There were some things you did not put under a microscope because you were afraid of what they would tell you about the person who made them.

She made notes anyway. Cloth over boards, quarter-bound, sewn on three cords. Text block intact but fragile, leaves cockled by some old soaking. Seven leaves torn from the middle, the stubs still sewn into the gutter, neat as a row of teeth. No foxing, which was odd. No mold, no rust lines, none of the tidemarks of dirty water, as if whatever had drenched this book had been clean.

"Okay," she said. "Hello. You're older than I remembered."

She was not a person who talked to books. She was a person who had learned that talking to a book was a healthier habit than talking to herself.

Something touched the page.

It was a single drop, round and bright, landing a hand's width above her thumb. She looked at it for a full second without understanding. Then the smell found her again, stronger, and this time she knew it. Salt. Not tears, not tap water. Cold, living salt, the smell of a harbor at six in the morning, in a city nine hours from the sea.

She looked up. The skylight was whole. The ceiling was dry. Rain drummed on the glass exactly as it had been drumming all evening, from the outside, where rain belonged.

Another drop fell, and another, out of the air itself, and where they landed, the ink began to move.

It did not run. She knew what running looked like; she had spent twelve years watching ink fail. This was slower and more deliberate. The blue-green of her mother's handwriting swelled outward from each letter in fine, branching tides, drew back, swelled again. A rhythm. In, out. In, out. The page was breathing.

"No," Maren said, quite calmly. "No, absolutely not."

Her hands moved before the rest of her had finished being frightened. That was what twelve years of the trade did to a person: it built a second self inside you who never panicked, who simply reached for the blotter. She slid a sheet of tissue under the leaf, laid a felt over it, pressed with the flat of her palm and felt the paper drink the water through the barrier like a thirsty animal. She changed the felt. She changed it again. She reached for the hair dryer on its lowest setting, and the second self said, gently, "Not too close."

"Come on," she muttered. "Stay with me. I've got you."

The breathing slowed. The ink drew back into its letters, one small tide at a time, and settled, and was only handwriting again. Low water. Count the pages twice. Maren let out a breath she did not remember holding.

And in the quiet that followed, with the dryer's soft roar in her ears and the book steady under her hands, a memory came up without being invited: a kitchen with yellow walls, the back of a woman's head bent over a broken cup, a thread of sound under her breath that was not quite a tune.

Maren did not close the book. She closed her eyes, which was the next best thing, and stood with both palms flat on the table until the kitchen went away.

When she opened them, the floor had changed.

She felt it through the soles of her boots first, a give, a softness, like stepping onto a mattress in the dark. The boards were still brown. The grain still ran the way it always had. But the jar of paste at the end of the table had begun to sway, and the surface it stood on was swaying with it, in long, slow, regular swells.

Under the sound of the rain there was a second sound. She knew it from the one trip to the coast she had taken at nineteen, alone, to prove that she could. Surf.

Three steps to the door. She counted them. She could have been on the stairs before the thought finished.

She looked at the door. Then she looked at the table, at the small tea-colored book lying open under its felt, ink still faintly damp.

"Oh, you have got to be kidding me," Maren said, to the room, to the book, to her mother, and lunged the wrong way.

She scooped it up against her chest, felt and blotter and all, as the boards went from soft to nothing.

The floor did not break. It simply stopped being a floor. One moment there was wood, and the next there was a cold, dark, rushing sea, and she went into it feet first with her mother's book crushed between her ribs and her own scream swallowed whole.

Salt filled her mouth. The cold hit like a fist. She could not tell up from down; the weight of the water was everywhere, dragging at her sweater, her hair, her fingers, tearing at the book. She locked both arms around it and did not let go. In the dark she thought of nothing, and then of everything: the unanswered message to her landlord, the hymnal due on Friday, the tea in her cupboard that she would never finish. Somewhere beneath the roar there was a deep, soft pulse, like a bell heard through a wall, and it seemed to be coming from the book itself.

The current took her down, and then, impossibly, up. Her lungs burned. The dark behind her eyes began to go red. And just as she thought, with great clarity, that this was a stupid way to die, something hard slammed into her back and the sea let go.

She lay on her side on stone, coughing up what felt like half an ocean. Cold wind. Wet rock under her cheek, ridged with barnacles. A grey sky hanging so low and soft it looked like paper. Gulls somewhere, or things that sounded like gulls. She curled around the book and retched until there was nothing left, and then for a while after that.

Alive, said the second self, practical as ever. Alive. Assess.

Hands: ten fingers, both palms scraped raw. Legs: present, shaking. Sweater: ruined. Phone: a hard rectangle in her back pocket, certainly dead. Book. She loosened her arms an inch, and looked, and very nearly wept. Sodden, swollen, the cloth gone dark with water. But whole, and still, against all reason, there.

"Okay," she whispered to it. "Okay. We're okay."

Boots on stone.

Not a rush of boots. A measured, unhurried approach, as if whoever it was had been walking toward her for some time and had decided not to run. A circle of yellow lamplight swung across the rocks, over her hand, over the book, and stopped.

"Do not move," a man said. "Not yet."

She moved, obviously. She got as far as her elbow before her arm gave out, and a stranger's boots came into view, dark leather, salt-stained, planted wide on the wet stones. Above them a long dark coat buttoned to a high collar. Above that, a face she could take in only in pieces: a hard jaw; hair the dark, rain-slicked blue of slate; eyes that were studying her with exhausted, unsparing attention.

He looked about thirty, and tired in a way thirty had no business being. He held the lamp in his right hand. His left hand, kept close against his side, was gloved in grey, though the right was bare. He did not seem alarmed. Everything about him said that this was not the first impossible thing to wash up at his feet, only the first with a pulse.

"Are you hurt?"

His voice was low and level, with the careful flatness of a man who measured out words the way other men measured medicine.

"Depends," said Maren, through chattering teeth. "Is this a hospital?"

"No."

"Then I'm fine."

"You are bleeding from both hands."

She looked. He was right. "Huh. Would you look at that." A faint, hysterical bubble was rising in her chest, the kind that came out as jokes. "In my defense, the sea was very rude."

He did not smile. Nothing in that face moved at all. But his eyes dropped to her hands, to the blue-black stain that had lived in her fingertips since she was sixteen and that no soap had ever shifted, and they stayed there a little longer than the situation required.

"You work with ink."

"With paper, mostly. The ink's usually somebody else's problem." She tried to sit up. The world tilted; she let it. "Where am I?"

"The Hollow Shallows. The outer edge of the Halvane Reach." He said it as though it ought to mean something. When her face made clear that it did not, a faint line appeared between his brows. "The Shallows do not open between the Blank Tides. The last one closed nine days ago. Not for a sailor, not for a keeper, not for anyone." He seemed to be speaking less to her than to the dark water behind her. "And yet."

"I'm sorry," said Maren. "I didn't get the memo."

"You came through the water." It was not a question.

"I came through my floor. It's a long story. Actually it's a very short story, I just don't believe it." She pushed hair out of her eyes with the back of a wrist. "Do you have a phone? Someone I can call? A, I don't know, a harbor authority?"

"I do not know that word."

"Phone?"

"No."

She waited for him to laugh. He did not laugh. He stood there with the lamp and the sea and that perfectly level gaze, and slowly, from the bottom of her stomach, a cold that had nothing to do with the water began to climb.

"What is your name?" he asked.

"Maren. Maren Ilves."

"Tavian Orrel." A pause, the smallest hesitation, as if he were deciding how much of the rest to hand over. "I keep the tide here."

"Of course you do," said Maren faintly, because it was that or scream.

"What does that mean, exactly?"

"It means that everything the sea does on these islands is my business." His eyes moved over her once more, from the salt-stiff hair to the ruined boots, with the same unhurried thoroughness she gave to damaged bindings. "And that tonight it has done something I did not expect."

"Do you do this often? Fish people out of the water?"

"No."

It was the single most honest answer anyone had given her in years, and it did nothing to help.

He set the lamp on a flat rock. He unbuttoned the coat, shrugged out of it, and held it out at the full length of his arm, so that the heavy wool hung between them like a flag of truce. He did not step closer. When she took it, he made certain their fingers did not touch, and she noticed, because it was a deliberate, practiced kind of avoidance, the way a person avoids a stair he knows is loose.

The coat was still warm from his body. It smelled of cold sea and lamp oil and, underneath, faintly, of ink: a deep, familiar, blue-green ink that her trained nose placed half a second before her brain refused to. She pulled it around herself and said nothing.

She got to her feet in stages, one hand on the rock. The sky was beginning to pale at its eastern edge, and now that she could see more than a circle of lamplight, the world assembled itself around her in pieces she could not argue with. Black stone, shining with wet. A shallow bay of water so still and so pale it looked poured. Out beyond it, a chain of dark islands strung toward the horizon like beads dropped from a broken thread, and very far across the water, a single thin spire of pale stone, small as a pin.

No road. No glow of a city on the underside of the clouds. No hum of engines, no wires, no distant sirens; nothing in all that air but wind and surf and the soft, huge sound of the sea breathing.

Condition report, said the second self, unhelpfully, because it was the only language it had. Location: unknown. Date: unknown. Surface: salt damage, extensive. Prognosis: poor.

Her breath began to come in short, shallow pulls. She was aware of her hands starting to shake in a way that had nothing to do with cold.

Tavian Orrel did not tell her that it would be all right. He did not touch her, or tell her to breathe, or do any of the things people did. He only moved, quietly, three steps to his left, so that his body stood between her and the worst of the wind. It was the smallest kindness, offered without comment, and she hated how much it undid her.

She tightened the coat around her shoulders. Her fingers were numb. They were too numb, in fact, to keep hold of what they had been holding for so long, and she felt the book slip, felt the weight of it go, and could only watch as it struck the rock and fell open on the wet stone.

The page lay face up in the grey dawn. Low water. Count the pages twice.

And the ink woke.

It rose from the paper in fine, pale-blue lines, tide after tide, spreading across the soaked page in the same slow rhythm she had watched in the workshop, in and out, in and out. Only now there was an answer. At their feet the shallow water drew back from the rocks by an inch, as if it were holding its breath. A deep soft pulse moved through the stone, and Maren felt it in her teeth.

Tavian looked down.

She watched it happen to his face. Not surprise; surprise she could have read. It was something that went through him from the inside, like a crack running through ice, and ended in absolute stillness. His eyes went to the handwriting, to the hook on the descenders, to the slant of every line. His left hand, in its grey glove, closed into a fist so tight that the leather creaked.

The sea breathed in. The sea breathed out.

"Mr. Orrel?" said Maren.

He did not answer. He did not look at her. He stood in the grey dawn with the whole slow ocean waiting at his back, staring at her mother's handwriting as though it were a name carved on a grave, and he said nothing at all.

That was what frightened her.