A Simple Guide to Rebreather Diving by Steven M. Barsky
Takes the mystery out of rebreathers and explains their technology in easy to understand language. Includes both semi-closed and closed circuit systems. 150 color photos/soft cover.
The Sport Divers Guide to Sunken Treasure by David Finnern
Interested in U/W treasure hunting? This book will guide you through metal detecting, bottle diving and more in both fresh and salt water. Soft cover/151 pages.
Dennis Graver's 100 Best Scuba Quizzes by Dennis Graver
Not trivia - this book is loaded with multiple choice questions and answers on equipment, physiology, emergencies, and more. Great for reference and review. Graver was formerly the training director for both NAUI and PADI and has tremendous experience from which to draw. Soft cover/223 pages.