Ruby Red Trilogy
The Ruby Red Trilogy is a series of three young adult fantasy novels by German writer Kerstin Gier. The three books are: Ruby Red, Sapphire Blue and Emerald Green. The books have been translated into over twenty-seven languages and sold internationally. The series follows the story of Gwyneth Shepherd, a time-traveling girl living in contemporary London. Source: Wikipedia (en)
Series - wd:Q21028117