John "Rabbit" Bundrick is credited as playing organ on the song I'm listening to. I looked him up. Wikipedia says:
As much as I'm enjoying the song/album, I can't avoid reiterating Nessa's question. Where's the book, Pete?
Bundrick first worked with Pete Townshend in 1977 when he performed on Rough Mix... He was invited to play on the Who Are You album, but broke his arm falling out of a taxi at the studio door and was unable to participate in the recording.D'oh!
As much as I'm enjoying the song/album, I can't avoid reiterating Nessa's question. Where's the book, Pete?