My Next Book Purchase

A Hard Day's Write: The Stories Behind Every Beatles' Song.

I need to know things like this (about I'm Only Sleeping):

During the break before the second bridge at about 1:57 minutes into the song, a barely audible voice (probably Lennon's) can be heard saying, "Yawn, Paul." Following this, the slightly more audible sound of McCartney yawning can be heard at about 2:00 minutes into the song.

via Wiki