D. J. MacHale
5) Black water
Author
Description
Bobby Pendragon must choose whether to endanger himself and the other residents of Halla in order to save the residents of Eelong who are infected with a mysterious plague.
10) The never war
Author
Description
Bobby Pendragon's most recent traveling takes him to the familiar First Earth, where he and fellow Traveler Spader must stay on the tracks of Saint Dane and his new evil plot, while also dealing with the tumult of New York City in 1937.
11) Raven rise
Author
Description
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.
13) Project Alpha
Author
Description
Eight boys and girls compete for a spot on the space voyage that will search for a source to solve Earth's energy crisis.