I can't believe...
that no one has mentioned the Tao of Pooh or the Te of Piglet. Perhaps I don't know enough about "serious" Taoism but those books were extremely interesting and accessible.
In my opinion they are a great introduction to Taoism, and despite their use of A.A. milne's characters are very inciteful. In fact the use of Eeyore (sp?) is ingenious.
Just thoughts from some one who doesn't know much, but knows what he likes.
"I believe that, in a stupid society, intelligence is useless." - Shen Congwen (My Education)