The one hundred and nineteenth book: #192 The Adventures of Sherlock Holmes - Arthur Conan Doyle
A book like this loses some of its power when you already know the stories. Sherlock Holmes is a known enough figure that a number of these stories have been adapted, for me most notably on TV and in podcast form, and so I knew what a bunch of the twists were. I'm not sure how it would have changed my enjoyment - some of the solutions aren't really ones you can work out from what you're given, especially no longer knowing the cultural context, but others feel fairer in that sense. It's well enough written and fun to follow along to, especially when it hits thestories I'm not as familiar with.