The Death of Achilles (2006)

In the fourth Erast Fandorin novel, The Death of Achilles, set in 1882, the ninja-trained diplomat/detective returns from Japan to Moscow, up-to-date with electricity and phones, yet mired in corruption. When friend Michel ''Achilles'' Sobolev, a war hero, dies unheroically — in a German songstress' boudoir — the sleuth must out-maneuver conniving higher-ups and descend into an underworld bristling with foppish safe-crackers and a vice den called the Hard Labor. Boris Akunin's witty, flavorful whodunit gains gravitas in a fine, near-Dostoyevskian portrait of Fandorin's quarry, a pale-eyed Chechen assassin as icily captivating as Hannibal Lecter.