I have done a good amount of non-fiction reading. Here is a short list of some of the most interesting books I've read. If you are interested learning about other species, these books make a good start. Some are more scientific than others, but they all contain interesting, and insightful information. Spoiler alert: If you love fishing and enjoy catch and release, you may want to skip What A Fish Knows.
I will ad more books to the list as time goes by.