The Book: On the Taboo Against Knowing Who You Are is one of Alan Watts's most accessible works. Watts's philosophy is very eastern-thinking oriented and this book reads very much like a Tao primer, although he twists and changes thoughts here and there to create a unique and interesting approach to metaphysical philosophy. The best thing about Alan Watts, especially this book, is that his philosophy can be applied to every day life situations; social interaction, psychological problems, and many other aspects of one's mind and perspective can be altered by viewing things in the way that Watts describes.
Alan Watts has changed my life in numerous ways and this book was one of the first that I read to learn more about his philosophy. I recommend this to anyone that has an open mind and wishes to explore ideas that may not fit into the normal Western thinking. This is an excellent book by a magnificent man.