This is a great book by Lama Surya Das. It's called letting go of the person you used to be.

The beloved American lama, a spiritual leader whose inimitable light and lively universal teaching style has awakened the spirituality of thousands, now shares an enlightened approach to change and loss, dealing with difficult emotions such as fear, grief, and anger, and the role of crisis in uncovering our authentic selves. 

(this book is used and in great condition)