Another writer about Spain history in english is Paul Preston. For sure he has a bio of Franco and another one of Juan Carlos. I've not red them but considering the great debate that the one of Franco caused here I guess it was at least supportive or comprehensive with him. Any list of bibliography I have about civil war is coming from books written by spanish writers and they are not very open to include references of foreign writers but anyway I'll take a look when I go back home.If I find something I'll let you know.
I don't know if you're aware of the way the Spanish Civil War is portrayed in American culture - the Brave Democratic Republican (good) side and the Murdering Fascist Nationalist (evil) side. Much of that is due to American Communists who fought with the Abraham Lincoln Brigade and came home to become teachers, some is due to Hemingway's novels.
One book I read in English was Combat Over Spain by a Duke or Marquis or some such (I'm not at home so can't check) - a Nationalist pilot.
I read Spanish probably on a third-grade level, and I'm pretty sure there aren't any children's books about the war.
I wonder how much of the resentment against Franco is due to the Gibraltar issue? I believe closing the frontier was his idea, not that of the British.