I enjoyed this book (and the first one) a lot more than expected! All the characters were very fun and much more flawed than I was expecting for a book of this period. Despite the name, it is very much Not a mystery novel, more a series of people running around enacting various plots. Which was still fun to read, just not what you'd think going in. I did think the introduction of Lecoq at the very end took away a bit from all the fun machinations of the protagonists, especially since he was literally only there for 20 pages. I don't know if he features more prominently in his other books, or if that's just the structure of this series, but I'd still be willing to read those other books to find out.