冊 (Satsu) is a Japanese counter meaning “counter for books, volume”.
Meanings
- countercounter for books
- nounvolume
Examples
彼女は１０冊も本を書いた。
She wrote as many as ten books.
彼は２冊の本を著している。
He has written two books.
部屋には１冊の本もなかった。
There wasn't a single book in the room.
Sentences from Tatoeba (CC BY 2.0 FR).