D. J MacHale

Middle-schoolers Marcus, Theo, and Lu return to the Library to help figure out, and fix, what is going wrong at a school in Massachusetts.

"They came from the sky parachuting out of military helicopters to invade Tucker Pierce's idyllic hometown on Pemberwick Island, Maine. They call themselves SYLO and they are a secret branch of the U.S. Navy. SYLO's commander, Captain Granger, informs Pemberwick residents that the island has been hit by a lethal virus and must be quarantined. Now Pemberwick is cut off from the outside world. Tucker believes there's more to SYLO's story. He was on...

When Pendragon finds himself in the war-stricken territory of Cloral, he and his uncle take it upon themselves to rid the area of marauders and locate the legendary lost land of Faar, which may hold the key to Cloral's survival.

When supernatural phenomenon start following Marcus O'Mara around, he discovers a key that leads to The Library, a place where all the stories of the living and dead are kept that will help him and his friends solve a terrifying mystery.

With more questions than answers about Saint Dane, Bobby travels to the territory of Quillan and is forced to play games where only the winner survives.

Just when 15-year-old Bobby Pendragon thinks he understands his purpose as a Traveler he is faced with an impossible choice.

While Pendragon is trapped on Ibara, Alder returns to Denduron and reluctantly goes into battle again, and other Travelers face obstacles of various sorts, Saint Dane gains the power he seeks on Second Earth and makes his push to destroy and rebuild Halla.

Eight boys and girls compete for a spot on the space voyage that will search for a source to solve Earth's energy crisis.

With Saint Dane seemingly on the verge of toppling all of the territories, Pendragon and Courtney set out to rescue Mark and find themselves traveling--and battling--their way through different worlds as they try to save all of Halla.