What is the author's style in The Big Short: Inside the Doomsday Machine by Michael Lewis?

The author of this book was once a broker on Wall Street. This experience led the author to feel somewhat bitter about the actions of those who work on Wall Street and to hope the book he wrote about his experiences would change the way people work on Wall Street. Instead, the author's first book became something of a how-to manual for young men like himself. It is with this outlook that the author investigates and reports on the stock market crash of 2008.