Reading is no substitute for practice - but here are some books we recommend that can inspire and help support your practice:
The Path to Bodhidharma by Shodo Harada
Zen Mind, Beginner's Mind by Shunryu Suzuki
Taking the Path of Zen by Robert Aitken
Buddhism Without Beliefs by Stephen Batchelor
Cutting Through Spiritual Materialism by Chogyam Trungpa
Hardcore Zen by Brad Warner
When Things Fall Apart by Pema Chodron
Wherever You Go, There You Are by Jon Kabat-Zinn
Prison Chaplaincy Guidelines for Zen Buddhism by Kobutsu Malone