"Stand by the Union" is a novel written by the American author Oliver Optic, which was one of his many works for young readers. The book was published in 1861 and is set during the American Civil War.The story revolves around a group of young people, including the protagonist, who are dedicated to supporting the Union cause during the Civil War. They engage in various patriotic and adventurous activities to support the war effort. The novel is a mix of adventure, patriotism, and moral lessons for young readers.Oliver Optic, whose real name was William Taylor Adams, was a prolific author of books for young people in the 19th century. "Stand by the Union" is an example of his many works that aimed to both entertain and educate young readers about important historical events, in this case, the American Civil War and the values of loyalty to the Union.