Red Chameleon (Porfiry Rostnikov, #3)

A Hunter
The violent and inexplicable murder of an old man in his bathtub and the theft of a worthless candlestick send Inspector Porfiry Rostnikov on a hunt into the past. But as his search narrows toward one feared and elusive man, the trail winds back to the most unexpected and dangerous place for Rostnikov.
A Spy
A ring of car thieves with a taste for expensive vehicles is at large in Moscow’s streets. Boyish undercover officer Sasha Tkach must pose as a young man of privilege in order to find and entrap them. But the striking female mastermind proves more cunning and deadly than Sasha has bargained for.
A Target
High above the gray city, a sniper is taking aim at police officers. Obsessed m humorless detective Emil Karpo takes the assignment to heart and wages a methodical, one-man crusade—using himself as a decoy.