Wendell's Recommendations

Excellent books for beginners:

The Conscientious Marine Aquarist by Robert Fenner

Reef Aquarium Fishes by Scott W. ichael

Marine Fishes Pocket Book by Scott W. Michael

Intermediate books:

Corals by Eric Borneman

Reef Invertebrates by Anthony Calfo and Robert Fenner

Books on Technology and Equipment used in the Reefing Hobby:

The Reef Aquarium by Charles Delbeek and Julian Sprung

There are many specialized books that any hobbyist may find of interest, try to buy newer books as the hobby has changed significantly over the past 10 years.