text: Why in the world would anyone publish a writer's bread and butter notes to his agent?  Besides the money, I mean.  There are a couple or three interesting fulminations against this publisher or that editor, whom Heinlein feels did him dirty.  But in the main this body of correspondence is of zero interest to any but the most complete worshipers of the sf master.  Just enjoy the stories, and nevermind the workaday business of how they got published
  