The plot is particularly interesting, especially when contrasted with modern times. Imagine an era in which political propaganda is released NOT in 15 second soundbites, but in the text of plays. The depiction of the contemporary drama scene in the book is quite accurate, showing exactly how much research Turtledove does to ensure his books are as authentic as possible.
There is something for everyone in this book—literature snobs will even enjoy trying to figure out which of Shakespeare's actual plays the "alternate" titles represent. The book is a refreshing reminder of why I started reading Turtledove to begin with. I can only hope that the good doctor will continue to release these "single shot" alternate histories in addition (or perhaps in place of) the extended sagas that he has been writing recently. Unfortunately, his newest work, Days of Infamy, looks to be the start of another megaseries.