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.
Full of photos of various ensembles, some on models and some photographed separately; lots of adverts for various shops. With such tips as how to carry your purse in a cute way, how to lean over to pick something up in a cute way, and how to pick up a cup in a cute way, it's a veritable bible for those who love the "goth-loli" craze. All text in Japanese.