The Spartan sacrifice
"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. Heavily outnumbered by the massive Persian army, the Spartan warriors and their allies are girding themselves for war when a horrible accident threatens the fabric o...