num_pages: 160
description: While attending the Teen Inventors Club competition in Chicago, Frank and Joe Hardy discover that someone is trying to sabotage Roger the Lobber, an automatic tennis ball retrieval and return unit. Original.
language: English
title: Robot's Revenge
titlecomplete: Robot's Revenge (Hardy Boys, #123)
genres: Young Adult, Childrens, Classics, Adventure, Thriller, Fiction, Mystery
ratings_count: 87
series: The Hardy Boys
publisher: Aladdin