Diary of a 6th Grade Ninja Books in Order

Starting at a new school, Chase Cooper knows only his cousin until a group of ninjas recruits him. Keeping a diary of his adventures, he discovers that belonging to their secret clan brings dangers far beyond ordinary sixth-grade problems.

A school day devoted to talking like pirates continues long after it should have ended. Chase Cooper dismisses rumors of an invasion until his classmates face real trouble, leaving the sixth-grade ninja responsible for protecting the school.

Science-fair projects begin disappearing and reappearing destroyed, threatening an event everyone has worked hard to prepare. An anonymous invitation sends Chase Cooper on a strange treasure hunt, forcing him to identify the culprit before more students lose their work.

A thief targets students at Buchanan School, and Chase Cooper unexpectedly joins forces with Wyatt to investigate. Following the robberies reveals a scheme much larger than he anticipated, testing his ability to protect the school and trust an unlikely ally.

The theft of Chase Cooper’s schoolbag sets off a disastrous week that turns him into Buchanan’s most wanted student. Discovering a rival red ninja clan adds another threat, forcing him to keep fighting when retreat seems increasingly appealing.

While helping his cousin campaign for school president, Chase refuses an invitation to join the Scavengers. Their retaliation turns classmates and friends against him, while a reporter threatens to expose his ninja clan before the group delivers its final blow.

A wild animal disrupts talent-show rehearsals and damages the stage, leaving Chase Cooper to track down the person responsible. New ninjas, a missing bird and an awkward costume complicate his attempt to prevent another attack before the performance.

Chase enters the school’s Spirit Week competition to stop Wyatt from strengthening his rival ninja clan. Keeping pace with a talented opponent is difficult enough without the Scavengers planning revenge, turning school activities into another battle to protect his friends.

The Scavengers return with a dangerous eighth-grade leader determined to take away what Chase values most. With his friends framed for damaging a school statue, Chase must unravel the scheme before it destroys his relationships and secret ninja life.

Chase reluctantly agrees to help Wyatt recover control of the red ninja clan in exchange for being left alone. A robotics contest and newly emerging rivals complicate their investigation, testing whether working with an old enemy can ever succeed.

An astronomy-club overnight coincides with a supermoon and a secret plan by rival ninja clans to destroy Wyatt. An unexpected offer forces Chase Cooper to reconsider the sides he has chosen during a week of escalating school intrigue.

A mysterious student posts photographs of the school’s ninjas and promises to reveal Chase’s identity at Friday’s dance. With old rivals returning and friends offering help, Chase must stop the exposure before his secret life becomes public.

A birthday scavenger hunt in a two-story arcade puts Chase against Wyatt and his cheating ninjas. When a video of Chase’s disguise goes online, sudden fame makes it harder to stop his rivals without exposing who he really is.