It is middle school aged, maybe 5th and 6th grade, and very much like a Beverly Cleary book, and it was in the mid to late 60’s that I read it. You flipped it upside down to read the alternate ending, which had a different cover. I loved it back then because it showed that bullies and the bullied are not so much different. The boy had a major challenge…to play in a school concert, it was either a bugle or a trumpet, and that was the end of both versions of the story.

I’ve looked all over and it seems not to be Beverly Cleary. I know I read it about the same time I was reading Beezus and Ramona.