Jon Courtenay Grimwood 
Exiled Blade 
Book 3 of the Assassini

Snow shrouds Venice in cold darkness, ice fills the canals and a thousand ghosts pluck at the shadow’s edge.A violent attack on Lady Giulietta’s son forces Tycho from his new-found happiness and back into the treacherous intrigue of the court. For Giulietta’s sake he would go to the world’s end to track down those responsible.As Venice teeters on the brink of civil war, its warring families prepare to discover who is a player and who is a pawn in the coming struggle for power.