What authors book endorsed the idea that hardworking Americans would succeed in America?

Horatio Alger, an American author, promoted the idea that hard work and perseverance could lead to success through his "rags-to-riches" stories in the 19th century. He wrote numerous novels that featured young protagonists who achieved success through determination and grit. Alger's books often conveyed the message that anyone, regardless of their background, could achieve the American Dream through hard work.