Modiphius released their excellent range of Achtung! Cthulhu rpg books, bringing the fight against the Old Ones to the Second World War. One of the adventures for this included a mysterious character called Seraph, who guides the heroes through a mission behind enemy lines in Finland. This adventure also came with a novella version of the adventure, which was a great little read.
Earlier today they sent out an email announcing another novel featuring Seraph called The Crystal Void. This time our mystery man is catapulted back in time to the age of Napoleon to continue the fight against the creeping darkness. It also marks the start of Modiphius' new setting, Mon Dieu! Cthulhu. Effectively Sharpe Vs Cthulhu... I'm sure someone has fan-ficced this somewhere, but the setting sounds like a lot of fun, especially if this also sees miniatures that we can use to turn Sharpe Practice into a mythos game.
If you fancy giving it a look, the pdf version is £2 from their webstore, or £1.80 if you follow this link to the store and search for Crystal Void.