Some important books that have really changed me and my outlook:
The Four Agreements
Way of The Superior Man
The Power of Now
A New Earth another Eckhart Tolle book
The 50th Law
The War of Art..yes The War of Art and not The Art of War.
I’ll add to the list as I recall others. I’m an avid book reader.
Authors to look out for that you can pretty much purchase anything they write and get something out of it.
John C. Maxwell
David Deida
Eckhart Tolle