Zen Mind, Beginner’s Mind. Shunryu Suzuki, Roshi
Classic text of the mind of a Zen Master and the founder of the San Francisco Zen Center.

Not Always So. Shunryu Suzuki, Roshi
More teachings from Suzuki Roshi.

To Shine One Corner of the World.  Edited by David Chadwick
Short stories of Suzuki Roshi told by his students

Trust in Mind, The Rebellion of Chinese Zen. Mu Soeng

Realizing Genjokoan, The Key to Dogen's Shobogenzo. Shohaku Okumura

Living By Vow, A Practical Introduction to Eight Essential Zen Chants and Texts. Shohaku Okumura

Training in Compassion, Zen Teachings on the Practice of Lojong. Norman Fischer

What Is Zen? Plain Talk for a Beginner's Mind. Norman Fischer and Susan Moon

Everyday Zen. Charlotte Joko Beck
A description of Zen in everyday life by an accomplished woman teacher.

The Still Point. Daido Loori

Returning to Silence. Dainin Katigiri

The Dhammapada. Gil Fronsdal
Some of the earliest teaching of the Buddha; good place to start.

The Path of Insight Meditation. Joseph Goldstein

A Path With A Heart. Jack Kornfield
Buddhism and psychology and more.

Teachings of The Buddha. Ed. By Jack Kornfield
Short sutra readings from various Buddhist traditions

What The Buddha Taught. Walpola Rahula
Great introduction to Buddhism

The Heart of the Buddha’s Teaching. Thich Nhat Hanh
Another good introduction to Buddhism

The Heart of Understanding. Thich Nhat Hanh
Easy to understand introduction to the Heart Sutra.

When Things Fall Apart. Pema Chodron

Lovingkindness, The Revolutionary Art of Happiness.
Sharon Salzberg
The practice of Lovingkindness (Metta)

Branching Steams Flow In The Darkness, Zen Talks on the Sandokai. Shunryu Suzuki

Enlightenment Unfolds, The Essential Teachings of Zen Master Dogen. Ed. By Kazuaki Tanahashi.
Read slowly, highly recommended.

The Book of Equanimity, Illuminating Classic Zen Koans. Gerry Shishin Wick

Cultivating the Empty Field, The Silent Illumination of Zen Master Hongzhi. Taigen Dan Leighton

The Gateless Barrier. Robert Aitken
Koans from the Mumonkan collection with commentary by Aitken Roshi.

In The Buddha’s Words, An Anthology of Discourses from the Pali Canon. Ed. By Bhikkhu Bodhi. Going to the source, with commentary by Bhikkhu Bodhi.

A Survey of Buddhism. Sangharakshita
A more in-depth study of Buddhism.