Hi coleychi,

I strongly recommend "Zen in Martial Arts by Joe Hyams".

Trust me, it's a life changing book where none of the chapters are more than 4-5 pages, and in reality the book has nothing to do with Martial Arts, except for the principles that are required to conduct oneself in real life.

If you can understand and bring those simple principles in your life, you won't need any other self-help book ever.

Bless you.