Here are some others: The Seesaw Log, by William GIbson, about the road to Broadway of his play,
Two for the Seesaw.
The Story of the Fantasticks---not sure who the author is, probably easy to find out.
Arthur Laurents' autobiography has interesting memories of creating West Side Story and other musicals he worked on.
There are two books about the making of Fiddler on the Roof, and three biographies of Jerome Robbins, that discuss in details, the making of all his musicals and ballets.
Hope this helps