An espionage caper set in the Russo-Turkish war. I love Boris Akunin's playful take on the spy genre, mix of Russian and other European influences and the Holmes-esque character of Erast Fandorin. But this is told from the point of view of Varya, at the war to find her fiancé, & Akunin portrays her as a silly (if plucky) woman without any real agency. And I prefer his books set in Moscow or St Petersburg to the war fields setting. Good ending.