Knowledge / Skills/ / Theory:
Deco For Divers By Mark Powell
Technical Diving: An Introduction By Mark Powell
Deep Into Deco by Asser Salama
Six Skills and other Discussion by Steve Lewis
Staying Alive Applying Risk Management to Advanced Scuba Diving by Steve Lewis
Under Pressure by Gareth Lock
NOAA Diving Manual
Mariner's Handbook by Steve and Linda Dashew
Dive History / Stories / Easy Reading:
Shadow Divers by Robert Kurson
Pirate Hunters by Robert Kurson
Last Dive by Bernies Chowdhury
Deep Descent by Kevin F. McMurray
Taming of the Slough by Sheck Exley
Caverns Measureless to Man by Sheck Exley
Scuba America by Zale Parry and Albert Tillman
Does This Island Go All The Way To The Bottom by Eric Pasley
Lost Wife, Saw Barracuda by John Kean
Into The Planet by Jill Heinerth
Where Diver’s Dare by Randall Peffer
Southern California Identification Books (obviously only relevant for divers in the area):
Certainly More Than You Want to Know About the Fishes of the Pacific Coast by Milton Love
Beneath Pacific Tides: Subtidal Invertebrates of the West Coast by Gregory C. Jensen
Seaweeds of the Pacific Coast: Common Marine Algae from Alaska to Baja California by Jennifer Mondragon
Marine Life of the Pacific Northwest: A Photographic Encyclopedia of Invertebrates, Seaweeds And Selected Fishes by Andy Lamb
Pacific Coast Pelagic Invertebrates: A Guide to the Common Gelatinous Animals by David Wrobel
Coastal Fish Identification: California to Alaska by Paul Humann
Crabs and Shrimps of the Pacific Coast: A Guide to Shallow-Water Decapods from Southeastern Alaska to the Mexican Border by Gregory Jensen
Eastern Pacific Nudibranchs: A Guide to the Opisthobranchs from Alaska to Central America by David Behrens
Between Pacific Tides by Edward Ricketts
The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon by James T. Carlton
Edit: Just realized on some of the more technical books there may be additional authors, and I only listed the first author. No offense or anything intended, just lazy and don't want to reopen everything and grab all the other author names, should be good enough though to search/find it