This is the fourth thing I've "read" from him and I'd rank this as the 3rd. When he is the narrator as in this one, you are in for a treat. However, nothing beats "The Neurological Origins of Individuality". Better than "Behave" and similar but more multifaceted than "Stress and Your Body". In this one he brings up stories, cases, situations and provides a neurobiological explanation for why that thing happens. You are bound to find some of these interesting, while others not so much. It's more like a buffet of stories you'd hear from him if you were to sit down by a campfire, but in a scientific way that he can't turn off. The humour is there obviously, classic Sapolsky. This Great Courses format is lovely, but I believe for a while I'll return to normal audiobooks, as I feel like I've listened to everything I've wanted from him. I gave it a 4 as it's better than neutral (3) and many are bound to find it interesting, but it's more like a 3.5 for me. I knew many things already (having learned most from him). Some were downright disturbing, other topics seemed random but they arrived in this lecture due to his passion, so they are presented well. If you are in this field, and/or studying, you cannot go wrong with Sapolsky. I'm just casually interested in this stuff.