Emerald Green (The Ruby Red Trilogy, 3)

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.

• Sapphire Blue (The Ruby Red Trilogy)
• Ruby Red (The Ruby Red Trilogy)
• The Cruel Prince (The Folk of the Air)
• King of Scars (King of Scars Duology)
• Throne of Glass
• The Language of Thorns: Midnight Tales and Dangerous Magic
• A Court of Wings and Ruin (A Court of Thorns and Roses)
• A Court of Frost and Starlight (A Court of Thorns and Roses)
• A Court of Mist and Fury (A Court of Thorns and Roses)
• Six Of Crows Crooked Kingdom