Books by Kerstin Gier

Emerald Green (2013)
Since learning she is the Ruby, the final member of the time-traveling Circle of Twelve, nothing has...

Sapphire Blue (2012)
Sixteen-year-old Gwen, the newest and final member of the secret time-traveling Circle of Twelve, se...

Ruby Red (2012)
Gwyneth discovers that she, rather than her well-prepared cousin, carries a time-travel gene, and so...