It seems the book was inspired by a collection of Polaroid shots she gave to Kanye West for Valentine's Day.
"It ended up turning out so cool that we came up with this idea to do a book—a selfie book," Kim said during an episode of Keeping Up With the Kardashians. "I'm going to make some, like, super-racy. I mean, every girl takes like full like pictures of their ass in the mirror."
When her stepbrother Brody Jenner asks if it's only for Kanye, Kim says, "Yeah, but I might share some of them—some of them."