This book was a fun take on the “total amateur finds hidden code and spends a lot of time tracking down clues while other people think they may be losing it” genre that I enjoy. It had an odd style that might not be for everyone, a series of audio recordings, transcribed by fallible software, that tell nearly the entire tale. You have to figure out what might be an error, or a misremembering, or a mislead. It’s not necessarily a mystery you’re going to puzzle out on your own, but one that has an ending that makes sense and is interesting. This one features a librarian character and keeps you guessing right up until the very last pages.