"Diary of a Wimpy Kid" is a popular children's book series written by Jeff Kinney. The story follows the life of a middle school student named Greg Heffley, who navigates the challenges of growing up, friendships, and family dynamics. The books are presented in a diary format, featuring humorous illustrations and relatable situations. The series began in 2007 and has since expanded to include numerous sequels, spin-offs, and even a movie adaptation. It appeals to young readers with its engaging storytelling and comedic style, making it a favorite for both children and parents alike.