Rubinrot
Gwyneth Shepherd thought her cousin was the one destined for time travel, but a sudden spin through history proves her wrong. Now, Gwyneth must uncover the truth about her family's secrets and learn to navigate the past and present. With the help of Gideon, a fellow time traveler she initially finds annoying, Gwyneth journeys through different eras to figure out who to trust.
Sixteen-year-old Londoner who discovers she, not her groomed cousin Charlotte, carries the family's time-travel gene.
A fellow time traveler assigned to train and guard Gwyneth; initially dismissive of her, he becomes essential to her as their partnership grows into romance.
Gwyneth's cousin, raised her whole life to believe she was destined to carry the time-travel gene, and resentful when it turns out to be Gwyneth's instead.
Gwyneth's best friend and confidante at school, who helps her investigate the secret society she has been pulled into.
A member of the Guardians' Inner Circle, known to Gwyneth as Mr. George, who was her grandfather's mentor and closest friend and helps guide her into the Lodge.
Yes. Kerstin Gier wrote it in German as "Rubinrot," first published in 2009 by Arena Verlag. It is the first book of the Edelstein-Trilogie (Precious Stone Trilogy), known in English as the Ruby Red Trilogy, and was translated into English by Anthea Bell as "Ruby Red" (published in the UK under the alternate title "Girl about Time").
The trilogy is: 1. Rubinrot (Ruby Red), 2. Saphirblau (Sapphire Blue), 3. Smaragdgrün (Emerald Green). Each book follows Gwyneth Shepherd directly on from the previous one, so they are read in that order.