Christy Miller is now an independent nineteen-year-old college student living in Switzerland, where she's been attending an international university. After being on her own for nearly a year, Christy is surprised and delighted when her two closest friends, Todd and Katie, come to Switzerland to spend the summer break traveling around Europe. The three of them have very different expectations for the trip that threaten to make the time together much...

Now comes The Sigma Protocol, a new breakneck novel of intrigue, conspiracy, and terrifying deception. American investment banker Ben Hartman arrives in Zurich for a ski holiday, the first time he's been back to Switzerland since his twin brother died there in a tragic accident four years earlier. But his arrival in Zurich triggers something far more sinister than his brother's fate. When Ben chances upon Jimmy Cavanaugh, an old college friend, Cavanaugh...

What was supposed to be an Italian vacation for forensic anthropologist Gideon Oliver and his wife turns into a busman's holiday when their hosts' only child goes missing-and nearby construction workers unearth human bones. The family awaits Oliver's conclusions with both dread and cautious hope. But along the way, he'll expose some extraordinary deceptions that lay bare the long-hidden secrets at the dark heart of a highborn family.