Kinney began working on the 'Diary of a Wimpy Kid' concept. His initial idea was to create a humorous online comic strip aimed at adults, reflecting on the awkwardness and insecurities of middle school.

Kinney started publishing 'Diary of a Wimpy Kid' as a webcomic on Funbrain.com. The comic quickly gained a large and dedicated following, particularly among children and teenagers.

Abrams Books published 'Diary of a Wimpy Kid' in book form. The book became an instant bestseller, appealing to readers of all ages with its relatable humor and distinctive cartoon style.

Kinney has continued to write and illustrate new 'Diary of a Wimpy Kid' books, with each installment achieving significant commercial success. The series has been translated into numerous languages and sold millions of copies worldwide. He has also expanded the Wimpy Kid universe with spin-off novels and movie adaptations.

Jeff Kinney releases 'Rowley Jefferson's Awesome Friendly Adventure', the third book in the 'Diary of an Awesome Friendly Kid' spin-off series.