I bought this book for my daughter who's really into spooky ghost type stuff. She's loving this book, we've read through it several times already. The 3D ghosts effects are well done but it can be a little tricky keeping the iPad pointing at the page just right.
The stories were interesting, and the art is good. The VR part is a bit gimmicky, and is hard to do in very low light. We also had issues with having to hold the iPhone/iPad far enough away from the book to get the whole page on the screen.
However, once you find a position that works, the VR is really cool. A bit creepy on some pages, but nothing too scary (my 6 year old loved it).
I'm guessing augmented reality is in its beginning stages, but this book was fun to play with! My 9 year old enjoyed showing it to her friends. Certain ghosts were more interesting than others, but overall I'm glad I purchased it!