my Soul Expression

This book is how I learned to calculate my soul contract.  It has more information about the origins of this process if you want to learn more.  If I find more resources on soul contracts I will post them, but this is the only one I've found  so far with this information.

Your Soul Contract Decoded

Nicolas David Ngan

I'm in the process of learning about this.

Akashic Records

Linda Howe

I love this book because it explains in great detail how each planet interacts with the sign and house for your natal chart.

Decoding Zodiac Vol 1

Pratyush Bhattacharya

The Power of Now 

Eckhart Tolle

The Untethered Soul

Michael Singer

The Body Keeps the Score

Bessel Van Der Kolk

Trauma the Invisible Epidemic

Paul Conti

Feeding Your Demons

Tsultrim Allione

The Psychology of Money

Morgan Housel