Musical history of the 1980s book bleg.

I need one that’s not particularly partisan, neither a collection of hagiographies nor hit-pieces, and was written by somebody who doesn’t have his head up his a*s all the time. Oh, and eclectic: I will probably need to read up on the genres, but I need a good general primer. Which means, not one written for musicians.

I know, I know.  Simple, right? But surely something like this must exist. People love to argue about music.