User blog comment:PixCity/Book Suggestions, Anyone?/@comment-4849011-20161106004018

I thought of something today- House of Stairs by William Sleator (1974). It's classified as science-fiction, but I'd label it psychological horror as well.

As mysteries go, I'm sure you know about the classics- the Sherlock Holmes stories by Arthur Conan Doyle and the Monsieur C. Auguste Dupin stories by Edgar Allan Poe (A lot of people don't know that Poe actually invented the detective story). If you want something lighthearted, there's Donald J. Sobol's Encyclopedia Brown series and his Two-Minute Mystery series. Some might say, "Oh that's kid stuff..." Maybe, but the characters and humor in the Encyclopedia Brown series are great. Some mysteries appear in both Encyclopedia Brown and Two-Minute Mysteries, and it's interesting to compare and contrast. For example, a victim might be knocked unconscious in an Encyclopedia Brown story, but killed in a Two-Minute mystery.