Yeah, because I will describe this book as a historical, science-fictional spy novel. An extended episode of DW sans the time & space travel and a spiteful letter of twisted friendships and vengeance. Good book. I have and idea that Clire was inspired by works of Alan Po(Additional reading) becuase while reading several essays on The Fall Of The House Of Usher by him, I have noticed on the story development structufe of the charachters in general, that gave me this idea.
p.s: I finished a Doomsday book recently by Connie Willis, which I recommended to read too