“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.”

I really thought this was an okay conclusion to the series. I think I really out grown these YA books since I didn’t enjoy book two either. I really like the time-traveling elements. I only listened to this because this was my mystery candy prompt, which was to read a book with a color in the title and I automatically thought of this book.