"Joe Strong, the Boy Fish; or, Marvelous Doings in a Big Tank" by Vance Barnum is a children's adventure novel written in the early 20th century. The story centers around Joe Strong, a young acrobat and performer in a circus, who showcases his bravery and skills through various thrilling acts, including diving into a tank of water. The narrative explores themes of friendship, courage, and the challenges faced by circus performers. At the start of the story, the circus is bustling with excitement as it opens for the season. Joe Strong is preparing backstage along with fellow performers for his daring trapeze act and the "human fish" stunt by his friend Ben Turton. Tension builds as Ben unexpectedly suffers a cramp while in the tank, and Joe must quickly devise a plan to rescue him without alarming the audience. The narrative introduces a lively cast of characters, and through the lens of circus life, it sets the stage for Joe's adventures, emphasizing both the spectacular nature of circus acts and the underlying perils they can entail. (This is an automatically generated summary.)