Below you will find some other books, most available through a local University library or research library:

Cobras and general serpentes:
 

Crompton, John. The Snake. Nick Lyons Books, 1987. Facts and lore; first published in England.

Engelmann, Wolf-Eberhard and Obst, Fritz Jürgen. Snakes: Biology, Behavior and Relationship
to Man. Exeter, 1982. Interesting information, well illustrated.

Minton, Sherman A., Jr., and Minton, Madge Rutherford. Venomous Reptiles. Scribner, 1969, rev.,
1980. Discusses these creatures of menace, legend, and superstition.

Pinney, Roy. The Snake Book. Doubleday, 1981. General information on physiology, husbandry,
venom, lore, famous herpetologists.

Simon, Hilda. Easy Identification Guide to North American Snakes. Dodd, 1979. All native species
of U.S and Canada.
 

Reptiles and herpetology:

Behler, John. Familiar Reptiles and Amphibians of North America. Knopf, 1988. An inexpensive guide
to the most common types.

Breen, John F. Encyclopedia of Reptiles and Amphibians. T.F.H., 1970, 1974. Comprehensive reference.

Obst, Fritz Jürgen. Turtles, Tortoises, and Terrapins. Tr. from the German by Sylvia Furness. St. Martin's,
1986. Attractive book on habits, physical description, evolution.

Smith, Hobart and Zim, Herbert S. Reptiles and Amphibians. Golden Books, 1987. A beginner's guide
from experts on species of the American Southwest.
 

Venom and toxicology:

Wüster, Wolfgang, Dr.. Numerous scholorly papers re population systematics, dentitional phenomenoa,
taxonomy & toxinology. (with Roger S. Thorpe, C. J. McCarthy, M. J. Cox, P. Jinkatune & J. Nabhitabhata)

Amdur, Mary and others. Casarett and Doull's Toxicology. Pergamon, 1991. Classic now updated to
include more substances that damage genes.

Dreisbach, Robart H. and Robertson, William O. Handbook of Poisoning: Prevention, Diagnosis, and
Treatment. Lange, 12th ed., 1986. Includes hazardous substances, industrial and common poisoning, emergency treatment, etc.

Haines, Gail Kay. Natural and Synthetic Poisons. Morrow, 1978. Discusses varied poisons, toxicology,
a poison control center; for young people.

Silverman, Harold M. The Consumer's Guide to Poison Protection. Avon, 1984. Home emergency
procedures for toxic substances.

Articles on this website: 

An article about Bill Haast, one of the great pioneers and researchers into venom as medicine.

An article about the value of poisons and venoms in medicine and research.