Andrew Varga

Seventeen-year-old Dan and his partner Sam know that their only chance to stop Victor Stahl’s quest for global domination is another jump into the past. This time, they find themselves in ancient Greece on the eve of one of history’s most famous conflicts: the Battle of Thermopylae.

When another glitch in time threatens the fabric of history, eighteen-year-old Dan Renfrew and his partner Sam Cahill jump into the past again. They land in medieval France, just before Joan of Arc's miraculous lifting of the Siege of Orléans.

Dan Renfrew hates that he’s a time jumper—seventeen-year-olds should not be stuck with the responsibility of saving history. But with no one else stepping up to stop Victor Stahl’s plot to take over the world, Dan and his time-jumping partner Sam have no choice but to jump back....

Life is progressing normally for sixteen-year-old Dan Renfrew when he accidentally transports himself to England in the year 1066. He soon realizes that he’s trapped there, and that’s not his only astonishing discovery.

Seventeen-year-old Dan Renfrew's life is anything but ordinary. In addition to facing the usual teenage challenges, he has a secret. He's a time jumper, a member of a clandestine group tasked with fixing glitches in history.