A great place to start if you manage people or are on that career track. Lots of information, though it can seem a little out of touch if you're not working in a cut throat corporate FAANG. Still, the principles are easy to understand and the author backs it up with examples and some supportive studies. 

My key takeaway: people management is absolutely not for me, but I think we all could be much better about directness, clarity, and helpful feedback.