"Grumbles from the Grave" is not a story. It does, however, give you a glimpse of the relationship between author, editor, and publisher through excerpts from personal correspondence. It also gives you a glimpse of the personal makeup and character of Robert Anson Heinlein. The book is edited by his widow Virginia Heinlein.
This is the sort of book that is entertaining for a Robert A. Heinlein fan who has read all or most of his work. It has little literary merit as a story, but is packed with information for the serious fan.
Letters written by Robert Heinlein published posthumously (as was his wish). From the back cover: "Here are his most personal thoughts and opinions on publishers, travel, juvenile novels, adult novels, work habits, fan mail, housebuilding and its demands and frustrations, reviews, and his writing methods, as well as the ethics he saw in writing good science fiction."