THE SULLIVAN DETECTIVE AGENCY: DOUBLE TROUBLE THE CASTLE QUEST (PART-II)

The twins travel to Ireland with Amos Murphy, only to discover ancient family secrets, hidden passageways, and a creature from Irish folklore. With new friends Ciara and Finley, the Sullivan Detective Agency must navigate haunted legends and a castle full of surprises in this suspenseful children’s mystery book series​ packed with cultural intrigue and teamwork.