Non-fiction:
* Marley & Me: (2005) - A humorous and heartwarming account of Grogan's experiences owning a Labrador Retriever named Marley.
* The Longest Walk: (2010) - A memoir about Grogan's journey across America with his wife, Cheryl, and their dog, Sparky.
* The Dog Ate My Homework: And Other True Tales from the Life of a Dog Lover: (2014) - A collection of humorous anecdotes about Grogan's experiences with dogs.
* You're Lucky You're My Dog: (2016) - A continuation of *The Dog Ate My Homework*, featuring more dog-related stories.
* The Next Chapter: My Life, My Dogs, and My Unlikely Journey to Finding My Purpose: (2021) - A reflection on Grogan's life and his love for dogs, sharing lessons learned from his journey and how he found his purpose.
Fiction:
* The Adventures of McGee: (2013) - A children's book about a dog named McGee who goes on a series of adventures.
Grogan also co-wrote the screenplay for the film adaptation of *Marley & Me*.