The Sigma Protocol

b" Now comes The Sigma Protocol, a new breakneck novel of intrigue, conspiracy, and\nterrifying deception. \nAmerican investment banker Ben Hartman arrives in Zurich for a ski holiday, the\nfirst time he's been back to Switzerland since his twin brother died there in a\ntragic accident four years earlier. But his arrival in Zurich triggers something\nfar more sinister than his brother's fate. When Ben chances upon Jimmy\nCavanaugh, an old college friend, Cavanaugh promptly pulls out a gun and tries\nto kill him. In a matter of minutes, several innocent bystanders are dead - as\nwell as Cavanaugh - and Ben has barely managed to survive. "