For Fish Collectors, Treasure Divers, Photographers, Snorkelers.
Bill Slosky & Art Walker.
Sterling Publishing Co. Inc., New York, 1966.
Hardcover, cloth covered, no dustjacket (on my copy at least), 192 pages, quite a bit of volour throughout. 
This is not one of the "how to dive" instruction books. It is far more readable in th sence of having a book to read in bed or before a cozy fire - well written on the subjects that we all enjoy - from diving itself, to marine life, treasure, diving, underwater photography.
The blurb on the back of the book is as follows:
Up to now, the blue-green hue of the ocean depths has distorted all photographs taken beneath the surface of the sea. Divers emerging from the depths have told of the wondrous sights that until now have never been recorded on full-color photographic plates. Bill Slosky and his co-author have discovered a new way of taking photographs that brings out the long-elusive red, orange, and yellow tints that exist in corals, sponges, shells and in the exotic fishes of tropical and sub-tropical waters. This book, with its breathtakingly beautiful, true-to-life photographs is a comprehensive, classified guide to the denizens of coastal waters.
But even more than that, this book contains:
For the snorkeler a quick course in skin diving,detailed instructions on the use of masks and fins rules for netting and collecting,  the correct methods of spearfishing .
For the treasure hunter: what to look for: coins, shells, amphorae, etc., where to search for sunken wrecks,  how to get your precious finds to the surface.
For the photographer : the prqper equipment, underwater flash techniques
So, whether you have a special interest such as fish collecting or photography, or if you just want to glide along the bottom as a spectator, you will fino this book an invaluable and visually stimulating aid to your adventures into the underwater. Remember, you won`t need elaborate apparatus-just a simple mask and a simple camera to open up awhole new, gloriously vivid world!