Introductory

What is Zen? Plain Talk for Beginners by Norman Fischer and Susan Moon
Zen Mind, Beginner’s Mind by Shunryu Suzuki
Buddhism, Plain and Simple by Steve Hagen
Introduction to Zen Buddhism by D.T. Suzuki
Wherever You Go, There You Are: Mindfulness Meditation in Everyday Life by Jon Kabat-Zinn

General practice

An Open Heart: Practicing Compassion in Everyday Life by The Dalai Lama
The Heart of the Buddha’s Teaching by Thich Nhat Hanh
Subtle Sound by Maurine Stuart 
When Things Fall Apart by Pema Chodron
Everyday Zen by Charlotte Joko Beck
Path with Heart; After the Ecstasy by the Laundry by Jack Kornfield
The Zen Commandments by Dean Slyuter
Ashes on the Buddha by Seung Sahn
Zen Cancer Wisdom by Daju Suzanne Friedman 
Black and Buddhist: What Buddhism Can Teach Us about Race, Resilience, Transformation, and Freedom Edited by Cheryl A. Giles and Pamela Ayo Yetunde
The Hidden Lamp: Stories from Twenty-Five Centuries of Awakened Women by Zenshin Florence Caplow (Editor), Reigetsu Susan Moon (Editor)
Zen Wrapped in Karma Dipped in Chocolate by Brad Warner
The Way of Tenderness: Awakening through Race, Sexuality, and Gender by Zenju Earthlyn Manuel
This is Getting Old by Susan Moon 
Zen Women (Beyond Tea Ladies by Iron Maidens and Macho Masters) by Grace Shireson
Paradise in Plain Sight by Karen Maezen Miller
Why Buddhism is True by Robert Wright
The Platform Sutra: The Zen Teaching of Hui-Neng – translated by Red Pine 
The Diamond Sutra – translated by Red Pine
The Lankavatara Sutra: Translation and Commentary by Red Pine
Sitting with Koans; John Daido Loori
Eloquent Silence: Nyogen Senzaki’s Gateless Gate and Other Previously Unpublished 
Teachings and Letters edited by Shinge Roko Sherry Chayat
Essential Teachings of Zen Master Hakuin by Norman Waddell
The Dhammapada by edited by Eknath Easwaran 
What the Buddha Taught by Walpola Rahula
The Way of the Bodhisattva by Shantideva

Advanced Practic

The Essence of the Heart Sutra: The Dalai Lama’s Heart of Wisdom Teachings by The Dalai Lama, Thupten Jinpa (Translator)