Books in Hardy Boys, Undercover Brothers series

The boys go on a chilling mission—camping in the woods where children have suddenly begun to disappear. Every time a child disappears, the word "LOST" has appeared outside their tent…and they are never heard from again. The boys think they’ve got things covered; they’re ATAC agents after all. But when an "L" appears outside their tent their first night in the woods, things take a turn for the creepy.

MISSION: To investigate the shady goings-on at the exclusive private boarding school Willis Firth Academy. LOCATION: The mountains of New England. POTENTIAL VICTIMS: The brothers of Gamma Theta Theta, the most elite fraternity on campus, seem to be on the receiving end of all of Firth's biggest (and most dangerous) problems. SUSPECTS: The members of the frat may seem like brothers to everyone else, but Gamma Theta Theta insiders know that within the ivy-covered walls the boys are definitely not one big happy family.... This mission requires your immediate attention. This message will be erased in five seconds.

 ATAC BRIEFING FOR AGENTS FRANK AND JOE HARDY MISSION: To discover the criminal responsible for forging versions of valuable original comic- book art. LOCATION: A huge comics convention in San Francisco, CA. POTENTIAL VICTIMS: A major comic-  book artist stands to lose a lot of money, but thousands of fans at the convention could lose their lives if the culprit gets desperate. SUSPECTS: Rival artists, obsessed fans, and even a co-owner of the local art gallery are all possibilities. THIS MISSION REQUIRES YOUR IMMEDIATE ATTENTION. THIS MESSAGE WILL BE ERASED IN FIVE SECONDS.