Rubinrot by Kerstin Gier is the first book in the “Precious Stone Trilogy” and follows the story of Gwyneth Shepherd, a teenage girl who discovers she has the ability to time travel. As she navigates this newfound power, Gwyneth becomes entangled in a centuries-old secret society and must unravel the mysteries of her family’s past. Filled with romance, intrigue, and adventure, “Rubinrot” is a captivating blend of fantasy and historical fiction.