Very good book, when I read about it I went to buy it (Was hard to find, but Alex told me where). Although it doesn't includes all Costa Rican frogs, it includes the most common ones and the ones you are most likely to find while field herping, believe me. It includes a very good description to the mentioned species, and also has a photo section. The book also includes a description to some salamanders, caecilians and reptiles. It is also smaller than Savage's book, which you can't carry in the field.

Great book