Eight Books
Eight Volumes
noun
When you have eight books you have eight books. This is an example of how to count books, so if you have eight of them this is what you'd say.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. The はち part gets shortened as it often does when put into situations like this, making it はっ. The 冊 is all normal, and to the "book(s)." Har!
学生は八人だから、教科書は八冊必要です。
Because there are eight students, we will need eight textbooks.
今日は外に出ず、一日中マンガを読んでいて、合計で八冊読みました。
I didn't go outside today and read comics all day, eight in total.
お金がなくてイスが買えないので、本を八冊つみ上げてイスの代わりにしています。
I have no money and I can't buy a chair, so I use eight books as a chair instead.