Curse of Cranston Castle : Fiction Express (The Time Detectives, Fiction Express) -- Paperback / softback

The Time Detectives, Joe and Maya, are exploring a ruined castle in Scotland when they uncover the story of a stolen chalice and a curse that led to the castle's downfall 750 years ago. Journeying back to the 13th century, they embark on a search for the chalice, hoping to restore the castle's fortunes. Will they succeed?