he is the acclaimed author of the thrillers : fatal exchange , the geronimo breach , zero sum , the delphi chronicle trilogy ( the manuscript , the tortoise and the hare , and phoenix rising ) , king of swords , night of the assassin , the voynich cypher , revenge of the assassin , return of the assassin , blood of the assassin , silver justice , jet , jet ii betrayal , jet iii vengeance , jet iv reckoning and jet v legacy .