This list is in no particular order.

Business, tech & nonfiction

Hard Thing About Hard Things by Ben Horowitz

The Everything Store by Brad Store

Who Is Michael Ovitz? by Michael Ovitz

Mountains Beyond Mountains by Tracy Kidder

Shoe Dog by Phil Knight

Ogilvy on Advertising by David Ogilvy

Justice by Michael Sandel

Spiritual & personal development

The Power of Now by Eckhart Tolle

Loving What Is by Byron Katie

The War of Art by Steven Pressfield

Big Magic by Elizabeth Gilbert

Man's Search for Meaning by Viktor Frankl

The Artist's Way by Julia Cameron

Bird By Bird by Anne Lamott

Outrageous Openness by Tosha Silver

The Alchemist by Paolo Coelho

Existential Kink by Carolyn Elliot