When Ruby Knight's best friend, Catriona Taylor disappears, she has a feeling something isn’t quite right. After Ruby pays a visit to Catriona’s Aunt, she’s faced with many questions. Has Catriona run away? Is she really on holiday with her parents? Or has something more sinister happened to her? Can Ruby find Catriona? Or should she ask her detective Mam for help? Follow Ruby on her journey to find her best friend! If you like ‘Nancy Drew’ or ‘Pretty Little Liars,’ then The Ruby Knight Chronicles is the perfect mash up!