I found these books particularly valuable:
Zen and the Art of Motorcycle Maintenance by Robert Prisig
The Dispossessed by Ursula K. Le Guin
To Have or to Be? by Erich Fromm
Siddhartha by Hermann Hesse
How to do Nothing by Jenny Odell
Digital Minimalism by Cal Newport
On Connection by Kae Tempest
Sand Talk by Tyson Yunkaporta
Sun House by David James Duncan
Animal Vegetable Miracle by Barbara Kingsolver
Blood Meridian by Cormac McCarthy