This is a good starting point...
The Qigong Bible - by Katherine Allen - Amazon - A excellent book for the Qigong student who wishes to learn about this ancient health system
The Tai Chi Bible - by Dan Docherty - Amazon - a good reference for beginners and advanced students alike - Price £11.99
The Complete Tai Chi Tutor - by Dan Docherty- Amazon - a good book for further study on Tai Chi theory and history for all students - Price £14.99
The Root of Chinese Qigong - by Dr Yang Jwing-Ming - Amazon - a comprehensive reference guide to Qigong - advanced only - Price £8.99
The Art of War - Sun Tzu - Amazon - Strategy concepts and analysis - Penguin edition £5.99