This is one of the best trading books trading ever written.
It took Mark Douglas seven years to complete the book.
Mark Douglas' book, Trading in the Zone, is a must-read for both beginners and re-read for already profitable and successful traders.
While bursting with informative advice on various ways of improving your trading skills, this book is primarily designed to adjust your behavior and the way you see things important for successful trading.
For example:
How to get a probability mindset and how successful traders see risk.
The book focuses on the psychology of trading and the relevance of having a healthy trader's mindset.
No wonder it is considered the "bible of trading psychology."
Here's an interview with Mark Douglas discussing some key points in his book: