Fugitive Six is the next book in a series that has a group of loyal fans. The first seven books are the Lorien Legacies, then the story continues with The Lorien Legacies Reborn. So, if you've been following the life of the Garde on Earth and wondering what has happened to the last survivors of Lorien, you might want to pick up the newest addition to this series - Fugitive Six.
As a note of interest, another author is adding to a well loved series. Christopher Paolini is adding to his Eragon series with a new book set in the land of Alagaesia. The Fork, the Witch, and the Worm will be coming out at the end of December. You can watch for it at the start of the new year.