The Castle of Otranto by Horace Walpole

I found this gothic novel to be a very quick read. Indeed, as the first gothic novel, it sets up some of the classic tropes including a creepy, haunted castle with subterranean passages, mistaken identities, revelations of noble birth, Italian settings, religious figures, and lots of violence. Particularly interesting to me was Walpole's dropped attempt to frame the manuscript as found.