| #2 |  The Bird Way: A New Look at How Birds Talk, Work, Play, Parent, and Think
| 4.1 | 13 reads | |
| #3 |  The Glitter in the Green: In Search of Hummingbirds
| 4.67 | 4 reads | |
| #4 |  Owls of the Eastern Ice
| 4.28 | 13 reads | |
| #5 |  A World on the Wing: The Global Odyssey of Migratory Birds
| 4.5 | 6 reads | |
| #6 |  Endurance: Shackleton's Incredible Voyage
| 4.48 | 192 reads | |
| #7 |  South: The Story of Shackleton's Last Expedition 1914-1917
| 3.56 | 17 reads | |
| #8 |  Desert Solitaire: A Season in the Wilderness
| 3.94 | 62 reads | |
| #9 |  Silent Spring
| 3.81 | 72 reads | |
| #10 |  Travels with Charley
| 4.07 | 96 reads | |
| #11 |  The Invention of Nature
| 4.09 | 45 reads | |
| #12 |  The Worst Journey in the World
| 3.54 | 16 reads | |
| #13 |  Icebound
| 4.42 | 6 reads | |
| #14 |  Travels with George
| 3.2 | 7 reads | |
| #15 |  The Professor & the Madman: A Tale of Murder, Insanity & the Making of the Oxford English Dictionary
| 3.84 | 127 reads | |
| #16 |  Frederick Douglass Prophet of Freedom
| 4.24 | 25 reads | |
| #17 |  Grant
| 4.47 | 51 reads |