Started last night; I'm reading this for Square 2, Guy Fawkes Night:
"Any book about the English monarchy (any genre), political treason, political thrillers, or where fire is a major theme, or fire is on the cover."
This seems to tick off all the categories -- Tudor Era political and religious conspiracies; even on the first pages, the Inquisition and the notion of burning heretics has already reared its ugly head ... and it's even got fire on the cover, too!