Tim O'Brien has written a wonderful informative and easy to use reference book about the best zoos, aquariums and wildlife sanctuaries in the U.S. Listed by state, each entry includes information on hours of operation, location, special exibits, admission prices and other nearby attractions. There are over 200 places reviewed, each unique and Mr. O'Brien lets you know what to see and what to miss. This guide can be used by both children and adults to find great animals all over the United States. We use it extentsively and it is a joy to read. I can only hope that it comes back in print for everyone to see.