If you're looking for a book about Moodle, our Moodle Books database has a wide range of books and manuals for teachers and administrators, written by members of the Moodle community.
Recently added titles include Moodle 2.0 First Look by Mary Cooch and Moodle as a Curriculum and Information Management System by Jason Hollowell. Both Mary and Jason are particularly helpful Moodlers in our Using Moodle course.
Additional new titles, all from Packt Publishing, are Moodle 1.9 Top Extensions Cookbook by Michael de Raadt, Moodle 1.9 Testing and Assessment by Jason Myrick and Moodle Security by Darko Miletic.
Packt Publishing are offering Moodlers 20% off the price of all their Moodle books sold this month and any four Moodle eBooks at a discounted price. See Moodle March for details.
Remember that buying a book from the Moodle Books database helps support Moodle development, since a percentage of all sales goes to the Moodle Trust.