It’s been two years since we moved and I haven’t unpacked all my books yet. Where did this come from? How long have I owned it?
I'm pretty sure I picked this up extremely second-hand, long after it was already obsolete, and quite likely have never actually read it, but it's absolutely the sort of thing that nine- or ten-year-old me would have loved.
Help Sherlock Holmes solve mysteries with the power of the Analytical Engine, which apparently runs BASIC.
Was apparently even notable enough someone did a very short paper on it in 2018.