It has been a while since a book from even 10 pages in breaks my model of reality a bit.
Just saying "I have a body" as a separation, instead of "I /am/ body" etc.
Very interesting, fun (witty) succinct.
Its my first Alan Watts book, so that could be part of why it hit me nicely.
Both by Alan Watts: The Way of Zen [1], and The Book on the Taboo Against Knowing Who You Are [2]
[1] http://www.amazon.com/Way-Zen-Alan-W-Watts/dp/0375705104
[2] http://www.amazon.com/Book-Taboo-Against-Knowing-Who/dp/0679...
[3] https://www.google.com/search?q=filetype%3Apdf+watts+book
[4] https://www.youtube.com/results?search_query=%22alan+watts%2...
Realizing who you are not changes everything.