Riddle of the Purple Emperor

This engrossing mystery features the quirky detective Hamilton Cleek, a one-time master criminal with an uncanny gift for impersonation who has decided to put his nefarious talents to use helping the police. A chance encounter with a young woman who arrived at a train station only to find that nobody has arrived to meet her quickly immerses Cleek in one of the most perplexing mysteries he's ever encountered.