"Europe is in the grip of the Dark Ages, but there is a light in the dark: Baghdad. The great city has become a center of learning, populated by scholars, merchants, and explorers from all across the known world. But danger lurks in the desert ... and Dak, Sera, and Riq must act fast to save the world's greatest library from utter destruction."-- Publisher's description.

"World War II is raging across Europe and the Axis and Allied powers are in a stalemate. Dak, Sera, and Riq can tip the scales in the Allies' favor if they can pull off the most daring spy mission of all time. But even if they succeed, are they playing into the SQ's hands?" --Back cover.

They've sailed on the Santa Maria, defended famous cities from Vikings and Mongols, and come face to face with some of the greatest figures in history. Now, at long last, Dak, Sera, and Riq travel back in time to the moment it all began. Their mission: to save the life of young Alexander the Great. But they are not the only time travelers in ancient Greece. An epic battle against their most dangerous foe awaits them, and history will be written by...

Kaley Bluster has her own view of the world history she reads for her 4th grade essay writing assignments. Her teacher, Mr. Serrano, tries to get her to write essays, but they always turn out to be creative commentaries on Kaley's life and her own interpretations of history in light of her modern world.