Ruby Red
Translated into English by Anthea Bell. Original novel (Rubinrot) was published in 2009.
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.
Readers also enjoyed
Kerstin Gier
In the world of time-traveling teens, hidden diaries, and secret societies, Kerstin Gier has carved out a space that feels both whimsical and wise. Best known for her Ruby Red Trilogy, Gier blends fantasy with romantic tension and just the right dose of humor—making her stories irresistible to young adult readers around the globe. Her gift lies not in epic battles or sprawling world-building, but in creating tightly woven tales where time travel feels like an emotional journey as much as a physical one.
The Ruby Red Trilogy
The Ruby Red Trilogy consists of three books. The current recommended reading order for the series is provided below.

