The book includes an index of QR codes for all of the apps listed, which is very handy for locating and downloading the apps that may be of interest to the reader. My one complaint is that the space between the codes is so small that I had trouble getting my phone’s camera to properly read the code I was aiming for.
I have been using several of the apps recommended prior to reading the book, and I’ve added quite a few more to my arsenal after reading it. All in all, it’s a good place to start if you’re not sure which apps to get, particularly if you’re like me and don’t always know what’s possible. However, I recommend picking up a copy of the book soon before it becomes outdated and irrelevant.