Wiktionary
n. A stock-bound notebook, traditionally with a marbled black-and-white cover.
Wikipedia
A composition book is one of a type of stock-bound notebook commonly used by writers and students in the United States. Although available in several colors, the original marbled black-and-white cover, with its generic label on the front, is the most common.
Usage examples of "composition book".
Still, he sat on his porch one last time, a tattered old composition book in front of him.
He came alongside Leonard and looked at me and made a slow and deliberate mark in his little composition book.
He yanked an ink-stained composition book from inside his rumpled jacket.
I flipped to the back of my composition book and tore out a fresh page.
Karen had placed a pencil, a composition book, and a bell in front of her.