This book manages to span a wide range of ages-- it has the middle school romance and intrigue of Wimpy Kid without going in to too much detail, and has the constant barrage of sight gags and goofy jokes that will go over well with younger crowds, much like Captain Underpants. The fact that this story is accompanied by a lot of pictures will make this an easy sell for reluctant readers. Timmy's headstrong personality gets him into lots of scrapes, but he means well and has a strong support network. I particularly enjoyed Aunt Colander's eager involvement in Timmy's plans.
The first (Timmy Failure: Mistakes Were Made) and second books in this series would be a great gift for children who have devoured other notebook novels.