What are the Best Personal Development Books?

What are the best personal development books? Our NLP training is special. During our classes, we connect Neuro-Linguistic Programming to deeper presenting problems and link them to neuroscience, positive psychology, and coaching.
Many people don’t know this about me, but when I am not in an NLP training I read 20 – 50 pages a day. It depends if I want to study, memorize, take notes or just read. Some personal development books topped my lists for years and then fall off. This is oft