I know everyone considers The REEF Aquarium Vol. 1 to be the "bible" of reef tanks, but after reading it, i felt i had learned very little additionl information. I had already purchased and read The Conscientious Marine Aquariust by Fenner. I learned everything from this book. It is also much cheaper and more up to date. The Reef Aquarium Vol. 1 is a good book, but since it was written in 1992, there are more than a few newer things missing; i.e., Compact Flourescents, Venturi skimmers, etc. While this book does an excellent job of covering inverts, there is no section on fish. IMHO, if you could only purchase one book on Reef Keeping, get Fenners, THe Conscientious Marine Aquarist.