A close friend encouraged him to write his autobiography:
"Pete, you're the 'Zelig' of the rock era! You've been in a film with Jean-Paul Belmondo and Farrah Fawcett. You coined the term "love-in." You smoked a joint with Bob Marley and the Wailers when they were your opening act [True, the Wailers opened for Procter and Bergman in Boston. Pete told me the joint was "arm-sized"!]. You guys gigged with the Buffalo Springfield. You've worked with Spike Milligan, and now here you are with Albert Ayler, for god's sake! I mean, come on! You have to do this!"