Scholastic's next multi-platform mega-event begins here! History is broken, and three kids must travel back in time to set it right! When best friends Dak Smyth and Sera Froste stumble upon the secret of time travel—a hand-held device known as the Infinity Ring—they're swept up in a centuries-long secret war for the fate of mankind. Recruited by the Hystorians, a secret society that dates back to Aristotle, the kids learn that history has gone disastrously off course. Now it's up to Dak, Sera, and teenage Hystorian-in-training Riq to travel back in time to fix the Great Breaks . . . and to save Dak's missing parents while they're at it. First stop: Spain, 1492, where a sailor named Christopher Columbus is about to be thrown overboard in a deadly mutiny!

Scholastic's next multi-platform mega-event begins here! Dak, Sera, and Riq might be in over their heads when they attempt to stop a Viking invasion!Hundreds of ships carrying thousands of warriors are laying siege to medieval Paris. The Parisians are holding their own, but the stalemate can only last so long. And that's bad news—especially since Dak has been captured, forced to work alongside the Vikings while Sera and Riq defend Paris from within. No matter which side wins, the kids lose!

The multi-platform adventure through time continues! Dak, Sera, and Riq return to the United States and walk immediately into a deadly trap. The year is 1850, and the nation is divided over the issue of slavery. In these dark days, the Underground Railroad provides a light of hope, helping runaway slaves escape to freedom. But the SQ has taken control of the Underground Railroad from within. Now Dak and Sera are left wondering who to trust... while Riq risks everything to save the life of a young boy.

Fix the past. Save the future. What is the secret history connecting the SQ to the Ancient Mayans?

Fix the past. Save the future. What marvels and dangers await Dak, Sera, and Riq when they visit the Golden Age of Baghdad?

Fix the past. Save the future. Dak, Sera, and Riq involve themselves in one of the most bizarre spy missions in history . . . and the outcome of World War II hangs in the balance.

Scholastic's next multi-platform mega-event comes to a thrilling conclusion with the last installment of the Infinity Ring series!

The New York Times bestselling series returns . . . and so does Matt de la Pena! Dak, Sera, and Riq have fixed the Great Breaks in history . . . but the SQ isn't beaten yet, and the biggest, boldest Infinity Ring adventure of all time has just begun!