Packt Publishing has a variety of ebooks that cover Moodle. Today through July 5th, you can buy any of their ebooks for $10. One possibility is Moodle Course Design Best Practices by Susan Smith Nash and Michelle Moore. "Moodle Course Design Best Practices is a practical guide that will teach you how to use the tools available in Moodle to develop unique courses for many kinds of organizations. You will be able to utilize the themes that have been contributed by developers. You can incorporate many different types of course materials and interactive assessments. You will also learn how to modify the structure and presentation of resources, activities, and assessments to create courses for individual use, cohorts, and Massive Open Online Courses (MOOCs). The use of the various multimedia features to enhance your Moodle courses is also explained in this book."
Tools and tips related to online and distance learning and using technology in instruction