- "Step into a circus of crime, and you're bound to walk a tightrope of terror!"
- — Tagline, from the front cover
High Wire Act is the 123rd book in the The Hardy Boys Casefiles series.
When Frank's old school friend Freddie Felix landed a job as a circus clown, he thought it was his big break. Now he's landed in big trouble instead. A suspicious fall has put him in the hospital, and the Hardys are determined to get to the bottom of it. They've decided to join the spectacle -- a three-ring circus of crime!
Under the big top, Frank and Joe uncover a mix of dirty deals and sinister secrets. And they face a deadly nemesis willing to use any weapon -- from poisonous snakes to man-eating tigers -- to put a quick end to their act. They may be dealing with a bunch of clowns, but this case is no joke...because there's nothing funny about murder!