The Ruby Red Trilogy is a series of three young adult fantasy novels by German writer Kerstin Gier.

Gwen experiences two more uncontrolled jumps through time, during the third of which she witnesses herself, or a double of hers, kissing a boy she has never met at a ball in the 1700s.

The Lodge is skeptical of the circumstances, but decide to watch Gwen to confirm that she has in fact inherited the time travel gene.

The next day, Gwen is called back to the Lodge, where she is surprised to find that she is needed in order to talk to someone in the past, her great-great-grandmother, and the eighth time traveler, Margaret Tilney, in order for her blood to be read in the chronograph, since Gideon had made two attempts to gather Margaret's blood, but both times, she had refused.

Gideon threatens Lucy with a gun, and makes her escort him and Gwyneth out the house, and as the two are running away, she tells Gwen to look up The Green Rider.

The two make their escape to a nearby church, inside a confessional booth, where Gideon, unexpectedly, kisses Gwen.

Gideon and Gwen meet with the members of the Inner Circle to discuss how Lucy and Paul knew about their visit to Lady Tilney.

In order to fulfill her quota of time travel for the day, Gwen is sent to the year 1948, where she meets Lord Lucas Montrose, her grandfather.

Lucas tells her that Count Saint-Germain murdered Lancelot de Villiers, the first time traveler, and his ancestor.

Lucas tells her that the Count had enemies in the Florentine Alliance, that he had private documents not recorded in the Annals, and that reading all twelve of the time traveler's blood into the chronograph was not the only thing that had to be done in order to reveal its secret.

Shocked, angry, and sad, Gwen confronts Gideon about it after they elapse to the present again and he doesn't deny that he planned making her fall in love with him.

Raphael discovers that the coordinates in Lord Montrose's copy of The Green Rider point to Gwyneth‘s house.

While arguing, Gwyneth discovers her past self staring at them from her third uncontrolled time travel and kisses Gideon as a distraction.

The series has gained worldwide popularity after being published in over 27 languages, including German, English, Chinese, Czech, Danish, French, Greek, Hungarian, Hebrew, Italian, Japanese, Korean, Dutch, Polish, Romanian, Spanish, Thai, Turkish, and Norwegian.

[2] In America, Ruby Red won the American Library Association Best Books for Young Adults award.

The film was directed by Felix Fuchssteiner, and the screen play was written by Katharina Schöde and author Kerstin Gier.