THE SULLIVAN DETECTIVE AGENCY: DOUBLE TROUBLE A JOURNEY BACK TO IRELAND (PART-IV)

Returning to Ireland, the twins reunite with friends and face a powerful foe—escaped criminal Joseph Dunn. As the legend of the Dullahan resurfaces, the agency must unravel the connection between myth and menace. Combining Irish folklore, high-stakes danger, and detective brilliance, this thrilling children’s adventure book series tests their courage like never before.