This is a summary of Liz Wiseman's Multipliers.

Growing up, the most influential coaches in my formative years always encouraged us to give 110 percent. Then I got to third grade, learned math, and was told it is a scientific impossibility to give more than 100 percent. I will never forget when Liz Wiseman told me my math teacher was wrong. Take that, Miss Fraser, you idiot.

This book, Multipliers, clearly shows how you can get more than 100 percent out of your direct reports. The result is a higher-performing, efficient team which gets more done with fewer resources. So, if you are a manager looking for added headcount and you suspect your boss has listened to this book (spoiler: they have), you are probably shit out of luck.