Evolution of the Earth, by Robert H. Dott, Jr. and Roger L. Batten, (McGraw-Hill Book Company, New York), 4th ed., 1988.

Fossil Invertebrates, ed. by Richard S. Boardman, et al., (Blackwell Scientific Publications, Palo Alto), 1987.

The Illustrated Encyclopedia of Dinosaurs, by Dr. David Norman, (Crescent Books, New York), 1985.

Manual of Mineralogy, by Cornelius Klein and Cornelius S. Hurlbut, Jr., (John Wiley & Sons, New York), 20th ed., 1985.

Simon & Schuster's Guide to Rocks & Minerals, ed. by Martin, et al., (Simon and Schuster, New York), 1978.

Trilobites, by Riccardo Levi-Setti, (University of Chicago Press, Chicago), 2nd ed., 1993.

There are many other good books out there; these are just the ones I happen to have in my personal library.