Rating: WORTHY!
There's no author listed for this book. It's a big, heavy, fat, sturdy book which has only four leaves, each of which is very thick and which contains a jigsaw which you can pop out and take your time rebuilding. The puzzles are quite simple, with few (~20 or so), quite large pieces so young children (not too young, mind, the pieces are undoubtedly very tasty!) can have a blast. I would have loved a book like this when I was a kid.
The pieces are brightly colored, and each jigsaw is cut exactly the same way, so that you could even mix up all the pieces and make some wonderfully psychedelic art work. On the back of each jigsaw puzzle page is a bit of a story about magical adventures, so there's reading to be had, too. The new book is rather expensive however, so I'd recommend finding this used somewhere. I recommend it for fun, and let's face it, that's all you really need!