The "How to Train Your Dragon" series is a collection of humorous and adventurous books written by British author Cressida Cowell. The series, which inspired the popular animated film franchise of the same name, follows the escapades of a young Viking named Hiccup Horrendous Haddock III. Hiccup, despite being the heir to the Hairy Hooligan throne, struggles to fit the traditional Viking mold and faces challenges as he trains dragons and navigates the intricacies of his Viking community.