In Self-Defense is a Western novel written by W.C. Tuttle and published in 1939. The story is set in the rugged terrain of the American West and follows the adventures of a young cowboy named Slim Martin, who finds himself embroiled in a dangerous conflict with a gang of ruthless cattle rustlers. The novel begins with Slim Martin working as a ranch hand for a wealthy rancher named John Harlan. However, their idyllic life is disrupted when a group of outlaws begin rustling cattle from the surrounding ranches. As the situation grows increasingly desperate, Slim finds himself taking on a central role in the fight against the rustlers. With the help of a small group of loyal friends, including a feisty young woman named Angie, Slim sets out to track down the rustlers and bring them to justice. Along the way, he must confront his own doubts and fears, and navigate a complex web of deceit and betrayal. Throughout the novel, Tuttle explores a range of themes, including the nature of justice and morality, the power of greed and ambition, and the importance of personal integrity and moral courage. He also offers a vivid and highly detailed portrait of life in the American West during the early 20th century, with all its dangers, hardships, and romance. "In Self-Defense" is a classic work of Western literature that has been widely praised for its engaging characters, vivid descriptions, and exciting plot. It is a thrilling and action-packed story of adventure, danger, and heroism, and remains a beloved classic of the genre.