The Untethered Soul by Michael A. Singer
A book that narrates a process on how to discern the voices in your head, extract from them, let go and listen to what your heart has been trying to tell you.
I love that Michael reveals the hidden path of our mind in a methodical way, making clear the choices of what needs to be done to calm the chatter and live the life our soul intends us to live.
A video interview on Oprah's Soul Sunday and other video talks are available on his site, linked to in the book title above.