UPDATED INFO: When I posted this review, there were ZERO reviews for this product. But after my negative review, two glowing reviews suddenly appeared, saying how wonderful it works. Neither of these reviews are "verified" by Amazon, which means the people who wrote them didn't purchase the book from here - they just happened to coincidentally stumble upon my review within hours of each other (and within hours of my first review). Not only that, but also magically, these two reviews have been marked as "helpful" while my Amazon-verified, honest review has been marked as unhelpful twice.
If you believe in coincidence, ignore my review. But in my opinion, something is hinky here and it ain't me. THIS BOOK DOES NOT WORK AS INTENDED.
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I saw a YouTube video back in July 2011 showing how this book works. The idea is great: anywhere in the book where there is black, you rub on it and the heat from your fingers makes the black ink translucent, letting you see the picture behind it. So, for example, you might see a man in a black trench coat, but when you rub on the coat you see that it is actually two "little people" - one standing on the other's shoulders.
Even though I knew it would take a long time to receive the book (it took about six months), I was willing to wait because I thought my kids would love it.
Unfortunately, the book doesn't work. You can only make the black ink turn clear after vigorously rubbing for a long time. By the time you get one portion of the picture visible, parts you have already rubbed have turned back to black. I let two of my kids try the book: a 5-year-old and an 8-year-old and neither of them could get the heat-sensitive ink to work, no matter how much they rubbed. When I used it, I quickly grew tired of the "work" of reading it and gave up after three pages.
The book arrived with a sticker on it that says "For best results, use a hair dryer." Really? I actually have to get out a hair dryer and use it to read this? My kids can't read it on their own? Not only that, but using a hair dryer causes every bit of black on the page to turn clear at once, which ruins the surprise of finding out what is coming up next.
Buyer beware: the concept is awesome and the content is great, but the execution is a big FAIL.