The Sigma Protocol Ludlum, Robert

Ben Hartman's ski trip to Switzerland turns lethal when a chance encounter with an old friend ends in bullets and blood. Suddenly he's running from assassins, framed for murder, and tangled in a conspiracy that reaches back to World War II. On the other side of the world, an American agent is hunting down aging men — all connected to a mysterious wartime pact called Sigma. As bodies pile up and corporate titans start dying, Hartman realizes he's stumbled into something that powerful people will kill to protect. Ludlum delivers his trademark globe-trotting paranoia: Alpine villages, Zurich banks, hidden Nazi gold, and a corporate conspiracy with roots in the darkest chapter of the 20th century. If you want shadowy organizations, breakneck pacing, and plot twists that demand a second read, this is peak Ludlum.