Gwyneth Shepherd's sophisticated, beautiful cousin Charlotte has been prepared her entire life for traveling through time. But unexpectedly, it is Gwyneth, who in the middle of class takes a sudden spin to a different era! Gwyneth must now unearth the mystery of why her mother would lie about her birth date to ward off suspicion about her ability, brush up on her history, and work with Gideon--the time traveler from a similarly gifted family that passes the gene through its male line, and whose presence becomes, in time, less insufferable and more essential. Together, Gwyneth and Gideon journey through time to discover who, in the 18th century and in contemporary London, they can trust. ...

Gwen's life has been a rollercoaster since she discovered she was the Ruby, the final member of the secret time-traveling Circle of Twelve. In between searching through history for the other time-travelers and asking for a bit of their blood (gross!), she's been trying to figure out what all the mysteries and prophecies surrounding the Circle really mean. At least Gwen has plenty of help. Her best friend Lesley follows every lead diligently on the Internet. James the ghost teaches Gwen how to fit in at an eighteenth century party. And Xemerius, the gargoyle demon who has been following Gwen since he caught her kissing Gideon in a church, offers advice on everything. Oh, yes. And of course there is Gideon, the Diamond. One minute he's very warm indeed; the next he's freezing cold. Gwen's not sure what's going on there, but she's pretty much destined to find out. ...

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....