Dennis Graver has more than 30 years of experience as a scuba instructor and instructor trainer. He has authored 27 books and manuals on scuba diving, including three previous editions of Scuba Diving from Human Kinetics. In his position as director of training for the Professional Association of Diving Instructors (PADI), he designed the PADI modular scuba course and wrote the PADI Dive Manual, which revolutionized scuba instruction. During his tenure as director of education for the National Association of Underwater Instructors (NAUI), Graver wrote several diving texts, including the NAUI Openwater I Scuba Diver Course Instructor Guide. He has also contributed hundreds of articles on diving to magazines such as Skin Diver, Sources, and Undercurrents as well as several NAUI technical publications.

From the Red Sea off the coast of Egypt to the barrier reefs of Australia, Graver has spent the past 32 years photographing many wonders under the water. He has won numerous awards from the Underwater Photographic Society, and his photos have graced the covers of numerous magazines and illustrated several diving texts and audiovisual educational programs.

Graver and his wife, Barbara, live in Camano Island, Washington.

"Scuba Diving keeps pace with today's progressive diving education. The book is a valuable resource for you now, in a future scuba class, and as you continue your diving education."

Tom Leaird, CEO, Scuba Educators International

Dan Marelli, Program Development Director, Scuba Educators International