Boris Akunin's well-loved, inimitable hero faces two very different adversaries: one, a deft, comedic swindler and master of disguise, whose machinations send ripples spreading through the carefully maintained calm of Moscow in 1886, and the other a brutal serial killer, driven by an insane, maniacal obsession, who strikes terror into the heart of the Moscow slums in 1889 - and who may have more in common with London's own Jack the Ripper than simply a taste for women of easy virtue.