BTW...I just counted those little QR squares and there are 105 of them in the book!
They work in less than a second if I QR scan in the actual book but do not work at all if I scan that image of the page on the screen. However, if I print out a picture of that image and QR scan the image on the paper they work fine. My screen is CRT and I would be interested to know if a QR scan works on a modern flat LED type screen?