Primatologist Frans de Waal has spent 40 years studying the behavior and emotions of primates. He talks about how primates experience jealousy, reconciliation, and empathy — just like humans. "That's a spectrum of behavior that we have, and the same thing is true for many other species." His new book is 'Mama's Last Hug.'

Also, book critic Maureen Corrigan reviews 'Zora and Langston: A Story of Friendship and Betrayal' by Yuval Taylor.