Sixteen-year-old Gwen, the newest and final member of the secret time-traveling Circle of Twelve, searches through history for the other time-travelers, aided by friend Lesley, James the ghost, Xemerius the gargoyle demon, and Gideon, the Diamond, whose fate seems bound with hers.

"Originally published in Germany in 2010 by Arena Verlag GmbH under the title Saphirblau: Liebe geht durch alle Zeiten"--Title page verso. Sequel to: Ruby red.