Review: Core "Secret" No Longer Works on Amazon
Rating: 4 out of 5
Date: 07 7, 2013
I purchased this and other books on tracking visitors to Kindle pages, after learning the "secret" elsewhere. It didn't work, so I thought the book would explain the code/technique better. It's the best of the bunch, But after a month of experimenting, conversations (and code samples) from the author, and extended back-and-forth with Kindle support, the tracking secret that the author includes (and explains very well), simply will no longer work. Amazon has closed that loophole. If you can still use it, you won't be able to for long. I've had to move on to another way of tracking, that admittedly isn't as good, bu also is not vulnerable to "fixes" by  Amazon. That having been said, Tom's book is excellent on explaining the basics of tracking and how to calculate your conversions. It's well worth the price and is a valuable read for those purposes alone