I found this book sadly redundant. While others may find it slightly more useful, I doubt there is a single person on earth for whom this book is correctly targetted.
It's a combination of
1. an introduction to digital photography
2. an introduction to Adobe Lightroom
3. an instruction book for the Leica M9.
While 2 & 3 make sense to some extent since buying an M9 gives you rights to Lightroom for your RAW processing, item one is aimed at someone who has never picked up a DSLR before let alone a Rangefinder.
I've been using Lightroom since the day is was launched since Adobe bought the company which made my preferred RAW processing engine, so item 2 for me was also redundant. Only item 3 was relevant, but since I'd already downloaded the camera instrcutions from the net, it too was redundant.
So the perfect buyer here has only ever owned a cheap compact camera, has never done their own digital RAW processing, and yet wants to skip owning a DSLR, and go straight to the Leica, costing 2 - 3 times as much as the best Nikon and Canon DSLRs. It's be like the household gardener branching out into diamond mining because "it's all diggin', innit?"
Caveat Emptor!