Some websites to explore:
http://www.cambridgedirectory.co.uk/
http://www.itcca.it/peterlim/index.htm
http://en.wikipedia.org/wiki/Tai_chi_chuan
http://en.wikipedia.org/wiki/Sun_Lutang
Here are some of my favourite books:
Zen mind Beginner's mind
by S. Suzuki
Zen in the art of Archery
by Eugene Herrigel
Tai Chi Touchstones
by Douglas Wile
The Essence of Tai Chi Chuan: The Literary Tradition
by Benjamin P. Lo, Martin Inn, Susan Foe, and Robert Amacker
Taijiquan: The Art of Nurturing, The Science of Power
by Yang Yang
Nei Jia Quan: Internal Martial Arts Teachers of Tai Ji Quan,
Xing Yi Quan, and Ba Gua Zhang
ed. Jess O'Brien
The Book of Chuang Tzu (Penguin Classics
by Martin Palmer and Elizabeth Breuilly
Tao te Ching- many translations- Tao Te Ching (Skylight Illuminations)
by Lao Tzu, Derek Lin, and Lama Surya Das is very acessible
Xing Yi Quan Xue: The Study of Form-Mind Boxing
by Sun Lu Tang,tr. Albert Liu, ed. Dan Miller
Sun Style BaGua Zhang including BaGua Sword
by Sun Lu Tang, translated by Joseph Crandall
Tao & Longevity: Mind-Body Transformation