Writing the book for a Broadway musical is a craft that is fraught with landmines. It is the delicate art of creating the framework for musical storytelling, a house of cards on which to hang the songs and characters that will hopefully yield a fascinating depth and a compelling purpose. When a musical fails, the blame is often put squarely on the musical's book, yet if a show succeeds, the book writer is rarely given the credit they are due. Despite the challenges a book writer faces, there has been a handful of craftsmen who have successfully delivered first-rate books that continue to be as potent and perfect as the days these shows opened. Help me celebrate the unsung heroes of musical theatre, the most-enduring of Broadway musical book writers.