Steven Johnson returns to share some key insights from his new book "The Infernal Machine: A True Story of Dynamite, Terror, and the Rise of the Modern Detective."

To end the week, we'll hear from Katherine Morgan Schafler, a former on-site therapist at Google, who challenges us to change the way we look at perfectionism.

In "Before It's Gone: Stories from the Front Lines of Climate Change in Small-Town America," Jonathan Vigliotti shares the stories of regular Americans who are confronting the effects of climate disaster.