If you have immersed yourself into the amateur acting sub-culture, this novel is exactly what you want to read. It's filled to the brim with inside jokes (I didn't get) and theater references. The magic is subtle, not as big a part of this novel as the emotional transformations of the cast. The magic is more an explanation for why these normal people can act with the minimum rehearsal time.
So why aren't I cheering along with the other reviewers? The book was more romance than fantasy, with character transformation, showtunes, and theater jargon being the whole thing. The author makes an effort at mystery (Director Rowan), but it turns into a veneer/delivery vehicle for the romance. The Crossroads Theater in Vermont feels more like rural America in the 1960's than the rural town I live in, and I found the hospitality of the townsfolk more a 'fantasy' than the rest of the book. The author assumes the reader knows the plots for musical theater; "Carousel", "The Elephant Man", "Into the Woods", and others are all referenced by page twenty-five. If you aren't familiar with theater (like me), the book loses a certain something and becomes merely 'OK'.
If you did tons of plays in college and high school and still have lines from them memorized, then add a star. If romance if your favorite kind of book, add another star. On the other hand, if you only like fast-paced actiony fantasy with combat and flashy magic, subtract a star.