I read this book after delving into "home yoga" for about 3 months. As is probably common, I was doing many of the poses only semi-correctly. There is a lot of reading to be done here, but there is incredible detail to help anyone elicit the poses correctly. Dworkis also divides each pose for beginner, moderate, and advanced. After a particularly tough day of running and 5 sets of tennis, I followed the poses and felt refreshed, relaxed, and loose afterwards. The workout is also really only 20 minutes (after learning the poses) and fun to complete as well as challenging when striving for a more advanced level.
As an exercise physiologist and certified group fitness instructor/personal trainer I highly recommend this book. I have been hesitant to try yoga because of the contraindicated moves (called poses), however this book makes the necessary modifications so that the program is safe, yet still effective and fun. I have looked at many yoga books, and even more videos and classes and this is my favorite. I actually recorded (audio) myself reading some of the descriptions of the poses so that I could do the entire sequence with someone to "cue" me with the appropriate instructions!