The "Diary of a Wimpy Kid" series is a childrens book series that falls under the genre of realistic fiction, satire, and comedy. The books are written and illustrated by Jeff Kinney and follow the daily life of a middle-schooler named Greg Heffley, who documents his experiences in a diary. The series has been highly successful, with over 275 million copies sold globally as of 2022, making it the fourth best-selling book series of all time.