The recreational diving Encyclopaedia for all things scuba diving. An excellent read as a pressie to yourself or for anyone with an interest in anything diving!
Sections on Diving Physics, Physiology, Dive Equipment, the Aquatic Realm - loads of creatures!.....also the Future of Diving.
A required item for the following, PADI Divemaster, PADI Assistant Instructor and PADI Instructor programmes (you need to know the book inside out for the theory exams!). Combine with the Diving Knowledge Workbook for a superb learning tool.