2.5* - Solidly middle of the road.
I'll be honest, I skimmed to the end of this one. If you come in with no prior knowledge of the subjects Henderson writes about, you'll probably love this. The Heart and Brain chapters, I really enjoyed as I don't know a lot about those subjects. It's pretty surface level, so a good introduction but not for people who want to go deeper. Unfortunately, the known outweighed the wonderful for me.