Juniper woke to the quiet thump of a page turning somewhere above her bed. The sound was gentle, like a moth landing on a window, and for a moment she held her breath and listened. The room smelled of chamomile and ink, the two scents folded together like a secret. She padded across the wooden floor in her bare feet, the boards warm from the afternoon sun that had not long ago gone to sleep. In the window the moon hung like a pale coin. Juniper pressed her palm to the cold glass and watched a tiny parade of moths circle its face, carrying slivers of old light.
Her home was the Night Archive, a library that sat on the topmost roof of the town, stitched into the eaves of the old clocktower. Shelves leaned against one another like old friends, and every book had a small note tied to its spine with thread that shivered when the wind passed. Juniper knew the notes by the way they smelled—some like lemon peel, some like coal, some like rain. She could tell by a single breath whether a lullaby had been sung a hundred times or a thousand.
At nine, Juniper's hands were quick and careful. She could thread a needle without looking, and she could smooth out a crease in a lullaby until the paper sighed. She lived with Mr. Wren, the keeper of the Archive, who moved through the stacks like someone tending a garden of sleep. He had thin hair that smelled of thyme and a waistcoat with stitched pockets full of small things: a brass thimble, a button that had seen three good winters, a pebble that hummed when it rained. He called Juniper his 'little curator' and left little drawings of foxes in her workbooks.
That night, Mr. Wren sat at a window table with a cup of tea the color of dawn. His face was a map of lines that always made Juniper think of flight paths. He hummed a tune that seemed to fit the tilt of the moon itself. Juniper slid a stool beside him, the stool that had worn smoother where her knees had rested while she learned to read song-maps.
'Listen,' Mr. Wren said, and he tapped the table once. The sound that rose was not a song, exactly. It was the kind of small thing that made the hair at the back of your neck stand up. A lullaby should have been there; instead there was a thin, empty space where a melody rested the night before. Juniper felt the air in her chest pull tight. She had laid out the lullabies earlier, had checked their stitches and their breaths. One shelf, the very shelf that held the Moon's lullabies, was lighter than it ought to be.
'Someone took a tune,' she whispered, though her voice felt ridiculous in the humming room.
Mr. Wren's cup trembled. 'A missing lullaby isn't like a missing sock. Tunes don't wander off. They are found or they are kept or they are forgotten. And sometimes—' He paused, watching the moon. '—sometimes they are held by things that were not meant to hold them.'
Juniper's fingers found the hem of her nightshirt and twisted it. Outside, the town breathed in sleep. Inside, the paper on the shelf breathed out nothing at all. The moon, which usually hummed soft backings to the Archive, was thin and hushed. Juniper had never felt the moon so quiet. She thought of the lullaby she had been learning, the one that Mr. Wren taught when the storms came, and she felt its absence like a missing tooth. She wanted, fiercely, to set that missing piece right.