Tom Swift in Captivity: A Daring Escape by Airship

Tom Swift in Captivity: Sam Preston, owner of a large circus, needs a new attraction for his side show. He knows of a place in the jungles of South America where a race of giants live. Tom is offered a reward to go procure one, and locate a hunter who has gone missing. A unethical competitor in a rival circus vies with Tom to find the giants. It's up to Tom to rescue the hunter and escape from the race of giants (Tom Swift Unofficial Home Page).