The Disappearance (The Hardy Boys Adventures Book 18)

The Disappearance of Harper is a thrilling mystery that will keep you on the edge of your seat! When Jones, Frank's new girlfriend, discovers she accidentally switched phones with her friend Harper at a comic book convention, she starts receiving strange and ominous messages.

The next day, when they go to Harper's apartment to investigate, they find it completely destroyed and Harper is nowhere to be found.

Frank and Joe start digging into their new friend's life, hoping to uncover the truth behind her disappearance.

But as they get closer to the truth, they realize that Harper may not have been who she seemed to be at all.

Will Frank and Joe be able to find their missing friend before it's too late? Read on to find out in this exciting installment of the Hardy Boys Adventures series!