Wow, what did I just read? It's as if Groundhog Day and the board game Clue got together with Agatha Christie and Hercule Perot and had a rager. I think if I were to read this again, I would create a story board like the ones you see in detective shows. The kind where they have the pictures of suspects and locations connected by string. It definitely got a little confusing sometimes trying to keep track of all of the different characters, the various plots and all of the other moving pieces. 

The concept of the story is really good. I haven't read anything quite like it before and it was quite a fun ride... and here's the 'but':

Once the Plague Doctor gets revealed as a prison warden and that Blackheath is basically a prison, the whole story falls apart. After watching the whole scenario play out over and over again for thirty years(!) how is it possible for there to be "new" revelations that the Plague Doctor had never entertained before? The ending is not very satisfying, either. Anna and Aiden are set free and that's it.

This book is probably perfect for anyone who likes 'who-dunnits' with twisty plots.