The most common Korean word for “book” is 책 (chaek). There are 2 more words with a similar meaning — compare them below. 「book」는 한국어로 책.
book
TOPIK 1 · noun
to book; to reserve
TOPIK 1 · verb
purchase in advance
TOPIK 1 · verb
Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato