Conceptually intriguing, but I found this book highly frustrating on multiple levels.
First off, I think when it comes to seek-and-find books you have to have a certain level of trade-off between detail and clarity: too much shading and/or blending, and it makes it far too difficult to tell things apart in a busy scene. While the artwork in this book was lovely as a whole, it was too complex and left too much room for guesswork when it came down to the details (i.e. Is that a tail or fabric? Is that a balloon or the top of a person's head?). There just wasn't enough contrast to tell things apart, especially in the sections that were 'farther away'. If I can't tell what I'm even looking at, how am I supposed to find specific objects (or, rather a tiny part of a larger object)?
Also, I take issue with the method in which the answers are shown: numerically?? I flip to the back in search of answers, not for a second, more frustrating I-Spy of the same page. I should not be scouring for a tiny 26 (out of 110, mind you) in the answers so that I can flip back to the actual scene to see what was supposedly representing a lollipop. Color code that shit.