For Ages 6 to 8: The Halloween Hoax (Nancy Drew and the Clue Crew #9) A grade-school aged Nancy Drew takes us along on this Halloween mystery adventure with her friends in The Halloween Hoax (Nancy Drew and the Clue Crew #9) ($6). Image Source: amazon.com The Halloween Hoax (Nancy Drew and the Clue Crew #9) $6 from amazon.com Buy Now