Frankenstein, by Mary Shelley (1818/1831), https://frankendiff.com; and Tales of the Dead, by Mrs. Utterson (1813), https://archive.org/details/talesofdead00utte
Just started Homer's Iliad (Fagles translation) and Christopher Logue's War Music (2015).
Just finished re-reading The Hitchhiker's Guide to the Galaxy, by Douglas Adams (1980). I think it holds up well. Last time I read it, I was much younger than Arthur Dent; now I'm much older. And now that we have computers with Genuine People Personalities, it's hard to remember what it was like in the Before Times.
Recently finished Gaston Leroux's The Mystery of the Yellow Room (1908). For better or worse (no spoilers here), it kept me guessing.