Through all these changes, the characters have remained popular; the books sell more than a million copies annually, several new volumes are published each year, and the adventures have been translated into more than 25 languages. The boys have been featured in five television shows and several video games, and have helped promote merchandise such as lunchboxes and jeans. Critics have many explanations for the characters' longevity, suggesting that the Hardy Boys embody simple wish fulfillment, American ideals of boyhood and masculinity, a well-respected father paradoxically argued to be inept in the later books, and the possibility of the triumph of good over evil.