This is not exactly a coloring book, but could very well be if you follow the lesson in it. 

The "lesson" is not very good. It is mostly 'how to reverse-engineer stock art' because that's all they use in the book. They don't even choose the art very wisely, except in the case of Sally, who looks just fine in all her shots. No fresh art is found, & it is not a particularly good lesson. This is in the SonicGear collection.