This is is a Japanese-language book or magazine devoted to fashion or cosplay ("COStume PLAY"), and may contain actual sewing patterns for creating your own clothing/costumes, as well as photos of completed outfits.
An amazing softcover book chock-full of full-color photos of gothic and lolita fashions, accessories, jewelry, shoes, tons of ads, artwork submitted by readers...if you love the scene or just like to look, you won't want to pass this up! All text is in Japanese.