
What Happened at Midnight is the tenth volume in the classic Hardy Boys mystery series, offering a thrilling adventure for readers aged 8-12. In this revised edition, Frank and Joe Hardy are enlisted by their detective father, Fenton Hardy, to secure a secret invention. Their mission quickly escalates into a complex case involving kidnapping, diamond smuggling, and high-speed chases, including a dramatic pursuit by biplane. The book showcases themes of teamwork, bravery, and justice as the brothers navigate dangers in their hometown of Bayport and New York City. Parents should note the moderate peril, including a kidnapping and a plane crash, but these elements are handled in an age-appropriate, non-graphic manner typical of the series. It's an excellent choice for children who enjoy fast-paced detective stories and sibling camaraderie.