Drupal 7 Theme Creation by David Ipswich
Approx. 20,970 words.
Published on February 10, 2013 by
The Drupal 7 Theme Creation Manual takes you step-by-step through the process of creating a completely new Drupal 7 theme. The book assumes you know how to upload and install Drupal but makes no assumption about anything else. You do not need any prior coding knowledge as the book takes you line by line through all the required code, teaching you as you progress through the book.