This is exactly what middle-grade mystery should be: smart, propulsive, and genuinely educational without being preachy. Sam Sedgman (of Adventures on Trains fame) knows how to balance puzzle-solving with character development, and the London setting gives it a distinct flavor that stands out in a crowded genre.

The science and civics content is legitimately impressive—kids will come away understanding how Big Ben works and why parliamentary democracy matters, all while racing across rooftops. The accompanying activity pack is a nice touch for kids who want to extend the detective experience.

This won't work for reluctant readers or kids who need constant action, but for the right audience—puzzle-lovers, mystery fans, kids who devour escape room challenges—it's a solid, enriching choice that parents can feel good about.