I'm sure I read The Fall of the House of Usher at some point, but I didn't retain enough that I had any particular expectations for the direction of the plot, etc.

However, I did read Mexican Gothic relatively recently, so I spent a good deal of What Moves the Dead, once the overall shape of the story became apparent, nodding along and waiting for the characters to catch up - it gave me a chuckle to see the reference to Mexican Gothic in the author's note.

Great writing, an intriguing reimagination of the classic.