Psychopath Whisperer, by Kent A Kiehl

The Psychopath Whisperer: The Science of Those without Conscience
by Kent A Kiehl, narrated by  Kevin Pariseau

In this fascinating scientific exploration into the biological differences between psychopaths and non-psychopathic people, Kiehl discusses his own dealings with psycopaths in prisons. Kiehl is known as the first person to use an MRI in a prison to study the differences between psychopaths and non-psychopathic prisoners. 

The Sixth Extinction, by Elizabeth Kolbert

The Sixth Extinction: An Unnatural History
by Elizabeth Kolbert
Narrated by Anne Twomey

I read this book a couple of months ago with Doing Dewey's nonfiction book club, but luckily I took notes. 

This book documents the mass extinction that Kolbert (along with quite a few scientists) believes is due to humans. It's not only about hunting animals out of existence. It's about carrying invasive species (including animals, plants and fungus) into new environments. These species are destructive to foreign ecological systems because each system did not develop in parallel with the new species - thus the system did not develop immunity and protection against the invasive species. For instance, our travels around the world transport fungus that have caused plague among bats world-wide, and frogs in the Southern Americas. This book is mainly a scientific endeavor written by a journalist, but we also get to follow Kolbert as she shadows scientists around the world in their quests to study and prevent extinction.