Offers books about volcanoes as well as guide books to national parks.

Online source for books on geology, paleontology, mineralogy, natural history, and exploration also carrying out-of-print and rare US Geological Survey and individual State Geological Survey publications. Specializes in pre-1950 North American geology and paleontology.

Provides books and other educational materials on wildlife, environmental science, natural history, and conservation.

Periodicals, reprints, books including antique, used and rare works related to the earth sciences and natural history.

Online bookstore specializing in sustainability and environmental topics. Also offers DVDs and educational resources.