Troll go do your own homework
Google it.
These days anyone can write a book. And anyone can be an expert at anything. Just say you are even with minimal experience or street cred.
I bet this book sells 8 million copies and they become the next Tony Robbins.
Four ZDs fired in 2 years and management wonder why so many people are jumping ship.
Did the company buy any copies for training?
You can expense it!