She Lover of Death — Boris Akunin

The Russian detective infiltrates a dangerous circle of suicidal poets in this “droll, incisive, and fiendishly clever” series set in nineteenth-century Moscow (The Seattle Times).
 
Naive young Masha Mironova arrives in Moscow at the turn of the century determined to shed her provincial Siberian upbringing. Reinventing herself as the reckless and daring Columbine, she soon falls in with a subversive group of poets known as the Lovers of Death. At the home of their leader, the Doge, these seductive bohemians conduct nightly séances to determine who shall be Death's next lover. Once named at a séance, the chosen member must await three signs from Death before taking his or her own life.
 
The resulting string of suicides have drawn media attention and sparked widespread hysteria in Moscow. As the group's numbers dwindle, the dashing investigator Erast Fandorin goes undercover to join their ranks. But will the gentleman-detective be able to stop Columbine from taking fatal action when she receives her three unmistakable signs?
 
“A devastatingly attractive combination of Sherlock Holmes, Lord Peter Wimsey and James Bond.” -- The Guardian