Correct

书皮

/ shūpí / 
Strokes

Definition

book cover/book jacket

Example

As a Noun

book cover

1
Duànmiàn
缎面
shūpí
书皮

satin book cover

2
Shèjì
设计
shūpí
书皮

design the cover (of a book)

As a Noun

dust cover

3
Bāo
包
shūpí
书皮

wrap a book in dust cover