A couple weeks ago my family spent some vacation time at Disney World in Orlando, Florida. If you have ever been to a Disney theme park then you know full well that it takes a lot of work in those parks just to have fun. Some of the most popular rides in these parks have waiting periods of up to two hours due to the long lines of people wanting to get on board. Luckily, my wife brought a Disney tourist guidebook that gave our family the helpful hints, recommendations, and information we needed to beat those long lines.  In the end, we ended up with a very enjoyable trip (so enjoyable that we got to ride Space Mountain twice!). That travel guide was a valuable asset to my family's vacation. 

Mastering Drupal is very similar to visiting a theme park as it takes some effort on your part to ensure you get rewarded for your effort. If Drupal is the amusement park then consider Drupal's modules as the park's attractions you're wanting to ride. With this line of thinking, I easily recommend that you let Earl and Lynette Miles' book, Drupal's Building Blocks, be your valuable tourist guide into the wonderful world of Drupal. I only review a few books each year and this is a book I gladly invested my time reading.