Berra, Tim M.Freshwater Fish Distribution. Academic Press, 2001. Excellent guide to the classification, identification, and distribution of nearly 170 families of inland fish.
Paxton, John R., and William N. Eschmeyer, eds.Encyclopedia of Fishes. Academic, 1994. Introduction to fishes and kinds of fishes.
Verhoef-Verhallen, Esther J., ed.Encyclopedia of Tropical Fish. Fitzroy Dearborn, 1999. A superbly illustrated A-to-Z encyclopedia of species suited to aquarium life.