Challenging for those with no prior background in Daoism. Very good though - a book to read and then read again as your knowledge starts to grow. Each reading will illuminate something new and different.
A very dense and obtuse text on a particular school of taoism called Complete Reality Taoism from the 11th century. It is certainly NOT a good introduction to such a diversified subject as taoism because "that which can be named is not the name". But, I found my copy for $2.00 so it was worth while to pick up ;)