Carl H. and Evelyn M. Ernst have completely revised their landmark reference Venomous Reptiles of North America to present the most comprehensive review of these animals in years.

The first volume contains species accounts of the venomous lizards and elapid and viperid snakes found north of Mexico's twenty-fifth parallel. Volume 2 of this definitive work covers the twenty-one species of the genus Crotalus found in the United States, Canada, and, for the first time, those found in northern Mexico.

Mixing their own research with careful data description and...