While the Tao Te Ching is better known, Chuang Tsu's work is certainly as important. Lao Tsu may have been the great master, but Chuang Tsu has the tone of a great teacher.
People looking for clear Taoist stances on the great philosophical questions will find Chuang Tsu both alluminating and frustrating, as it characteristic of Taoist philosophers.
No enthusiast of eastern philosophy should be without this.
While the Tao Te Ching is considered to be the foundation work of Taoism, I find the Chuang Tsu to be much more accessible. At over 2000 years old, this book addresses the human condition in a way that holds meaning even today. It is filled with tales that entertain on the surface while lodging deeply into your consciousness to chip away at your cultural conditioning. Save yourself a trip across the world looking for a guru . . . buy this book instead and take it along for a hike in natural surroundings. When you settle down in a comfortable spot, read the Chuang Tsu and see if it doesn't speak to you.