Frank Hardy is nine, and Joe is eight years old, and they’re the new kids on the block in Bayport. Searching a spooky old house for a baseball mitt, the boys

Frank and Joe Hardy go searching for clues into the disappearance of Chet's baseball mitt, when a bully throws it into an old spooky house.

A young girl attempts to unravel a series of puzzling happenings at the Denver, Colorado Capitol building.

ATAC BRIEFING FOR AGENTS FRANK AND JOE HARDY MISSION: To find the mastermind behind a possible attack at the Big Air Games. LOCATION: Philadelphia, PA. POTENTIA