I have been intersted in Taoism and Buddhism for the last 10 years, mainly because I practice Taoist Tai Chi.

I can recommend http://zenhabits.net/lg a book about letting go, a concept so hard to do and so easy to say :)

Edit: the best book about Taiosm that explains Lao Tzu's words is http://www.amazon.com/The-Tao-Speaks-Lao-Tzus-Whispers/dp/03...