The double tap - Stephen Leather

The Assassin - the world's most successful contract killer. Ice cool, accurate and elusive. An anonymous professional with a unique calling card - one bullet in the head and one in the chest for each of his targets.An ex-member of the SAS, Mike Cramer is the perfect sacrificial bait. When the FBI discover the next name on the assassin's hitlist, Cramer is set up to take his place. But Cramer's past has caught up with him. Ex-IRA extremist Dermot Lynch blames Cramer for his lover's death and he's out for revenge. As Cramer trains for the most dangerous mission in his career, Lynch hunts down his sworn enemy. And the unknown assassin silently closes in on his target. The players are in position for the final, deadly game...