Greg Heffley is back, and this time he’s caught between fighting back and making a run for it. Fight or Flight is the 21st installment in Jeff Kinney’s enormously popular Diary of a Wimpy Kid series, bringing another round of middle-school mishaps, awkward decisions, and signature Wimpy Kid humor.

Full story details are still under wraps, but longtime fans can expect the illustrated storytelling and comedy that have made Greg’s adventures a favorite with millions of readers around the world.

Pre-order now to reserve your copy. Expected October 20, 2026.

• Title: Diary of a Wimpy Kid: Fight or Flight
• Author & Illustrator: Jeff Kinney
• Series: Diary of a Wimpy Kid, Book 21
• Format: Hardcover
• Expected Publication Date: October 20, 2026
• ISBN: 9781419782701
• The 21st book in the bestselling Diary of a Wimpy Kid series
• Features Jeff Kinney’s signature combination of cartoons and diary-style storytelling