Who is Nostalgo ?

Posters with his unsettlingly grinning face are appearing on scaffolds all over London.
A murdered body, horribly disfigured and bearing a striking resemblance to the man on the poster, vanishes from a police-station.

Jack Masefield wants to protect his fiancée Claire from her shady guardian Anstruther, and before he knows it, he is in the thick of the mystery, unraveling a tale of greed, deception, revenge and dark deeds. - Summary by Sonia