This digital text created by Jaswinder Singh based on Jason Cole & Helen Foster’s Using Moodle 2nd Edition is available for free to Moodlers who are using 2.7. The text is 350+ pages and focuses on all aspects of Moodle’s standard modules and functionality, detailed information on all settings available to users (including administrators) and screenshots of various Moodle configuration screens.
http://www.moodlenews.com/2014/free-book-how-to-use-moodle-2-7-360-pages-of-moodle/