书皮

书皮	shū pí	book cover / book jacket
书	Shū	abbr. for 书经
书	shū	book / letter / document / CL:本,册,部 / to write
皮	Pí	surname Pi
皮	pí	leather / skin / fur / CL:张 / pico- (one trillionth) / naughty