Assassin's Dawn

"Recruited out of university, Slaton has excelled in training, and is proving highly effective in the operational world. The motivation behind his success is clear to those who know the truth: three years earlier, the two people he held dearest fell victim to a terror attack. The killer responsible, Ramzi Tayeb, has proved maddeningly elusive.
Then a chance: a Mossad operation in Central Europe aims to steal information from Ramzi’s brother, a terrorist financier who could lead to the shadowed extremist. Slaton takes the lead, but a mission to hack the man’s laptop goes horribly wrong, and soon the police are investigating a murder.
Slaton is withdrawing his team to safety when new information arises. Ramzi himself may soon appear—a rare moment of vulnerability. And so a new mission is born, one that is run not by Mossad, but by the most lethal operative it has ever created—an assassin destined to become a legend."