The Underdog is a novel about a 15-year-old boy named Cameron Wolfe who struggles with his identity and feelings of inadequacy. He questions his morality and falls for a girl.

The Underdogs is a novel about a peasant named Demetrio Macías who is hunted by government soldiers after a misunderstanding with a local land owner. The soldiers kill his dog and burn down his house, prompting him to abandon his family and seek revenge. Demetrio rises from a farmer to a general in the northern rebel army. He accumulates a group of 20 similarly disaffected peasant men.

The Under Dog is a short story by Agatha Christie. It is about Hercule Poirot's involvement in a case of a quarrel that led to the murder of Sir Reuben.