If you want to learn about bears, read "Smiling Bears." It is honest and interesting, and covers science as well as what is often ignored: emotions.
3. 'Sublime Nature' by Cristina Mittermeier
This is a great book of photography! From landscapes, to plants, to animals, it has beautiful images. These images are sorted into four sections; Awe, Grace, Joy, Peace. It has great representations of them all!
As well as photographs, "Sublime Nature" has quotes about nature in it as well. That is what really sets it apart in my mind, and makes me enjoy looking at it so much.
4. 'A Lion Called Christian' by Anthony Bourke and John Rendall
This story is truly charming. Two young men go to London and buy a pet lion, which made me not like them at first. But now I appreciate their honesty - even though it is definitely inadvisable to buy exotic pets. Unlike most exotic pet owners, these men did the best they could to love their pet. They share the joy of having a pet lion, as well as the pain when they see that they can't give him what he needs most. They work with George Adamson to give Christian a better life, which is both wonderful and sad to read about.