Comfortable with Uncertainty: 108 Teachings by Pema Chodron AudioBook
Pema Chodron is was the first American woman to become an ordained Tibetan Buddhist nun and she is one kick-ass lady. She lived a normal life before becoming a nun so she speaks from her real experience w/real life, not a theoretical understanding only. Her main focus on the "warrior bodhisattva" which is basically someone who aspires to be awake during their life. Comfortable w/Uncertainty is sort of a distillation and intro to a lot of her thinking about warriorship and waking up and dealing w/the fact that pretty much nothing other than groundlessness/uncertainty is certain. If you want to challenge yourself and start to understand one path to happiness, check out Pema's work. She rocks!