Mysteries surround a time-traveling heroine. (Ages 12 to 18)

--- Added from Google Books ---

The internationally best-selling romantasy series! Gwen has a destiny to fulfill, but no one will tell her what it is. She's only recently learned that she is the Ruby, the final member of the time-traveling Circle of Twelve, and since then nothing has been going right. She suspects the founder of the Circle, Count Saint-German, is up to something nefarious, but nobody will believe her. And she's just learned that her charming time-traveling partner, Gideon, has probably been using her all along. Emerald Green is the stunning conclusion to Kerstin Gier's Ruby Red Trilogy, picking up where Sapphire Blue left off, reaching new heights of intrigue and romance as Gwen finally uncovers the secrets of the time-traveling society and learns her fate.

--- Added from Hardcover ---

Since learning she is the Ruby, the final member of the time-traveling Circle of Twelve, nothing has gone right for Gwen and she holds suspicions about both Count Saint-German and Gideon, but as she uncovers the Circle's secrets she finally learns her own destiny. Since learning she is the final member of the time-traveling Circle of Twelve, Gwen has become suspicious of both Count Saint-Germain and Gideon. As she uncovers the Circle's secrets, she finally learns her destiny. The plot contains violence. Book #3