I have a friend who bought the set, and I just bought the Monster book from her; it's coming next week, so I don't have much info on it yet. I think it's just slightly smaller than the page to screen book.
The set is actually really beautiful from what I hear; the books are top notch quality and the binding/materials are very nice. The Monster book appears to be pretty well made; it's still a production piece, so will exhibit those "production" traits, but it looks like they made a good effort and did a great job of trying to make it more like a prop reproduction and less like a toy. An interesting thing to note is that the eyes look quite different than the original props; I'm wondering if they decided to make it look "friendlier" and more human like, with exception to the color of course. The gums/teeth area appears to be well painted with nice colors too.
Here are some preview pics before it was packed. I'll be taking better photos of it when it arrives!