The Spartan Sacrifice: A Jump in Time Novel, Book Four

Seventeen-year-old Dan Renfrew and his partner, Sam Cahill, know that stopping Victor Stahl's ruthless quest for global domination means risking another journey into the past. This time, their mission takes them to ancient Greece, on the eve of one of history's most legendary battles: Thermopylae.

Outnumbered by the vast Persian army, the Spartan warriors and their allies are preparing to make their desperate stand. But as the armies gather and the...