"Dr. Eggman used his evil technology to transform Sonic's friends into robots that he controlled"

(The interior of the book says the same thing on every page)

This is a Sonic notebook. It uses both stock arts, and art from the Sonic Screen Saver (a large selection of whimsical or interesting Sonic art by a professional artist) The interior has grayscales of Sonic and Tails. For some reason, they've included a small plot snippet from the games. Curiously, this was published/produced by Sanrio, the same people who make Hello Kitty.