The book I'm not reading while the nearby fellow nerds talk about... let's see, I think they've now talking about monarchies (no, they're back on Star Wars... no, Star Trek while I was writing this... no, they've bounced onto Firefly)... is Giles Milton's Checkmate In Berlin, which basically has me panting to run a Delta Green or Le Carré-inspired Forged In the Dark hack set in Occupied Berlin.