Request #430 From Jonathan

I am trying to remember a book I read in the mid 1970s, about a boy being bullied at school. It was set in the USA and I’m guessing it would have been written in the early 1970s. At one point the boy sings The Beatles’ “Let It Be” to himself to try and comfort himself. I remember it had a brown cover and I feel like it was a picture of a boy peering through a slightly opened door down a corridor. But the Beatles quote is definitely in it, I remember because I was then and still am a Beatles obsessive! “The Chocolate War” has been suggested to me previously, but it’s not that.