Is report to the principal office a mystery book?

"Report to the Principal's Office" is not a mystery book. It's a phrase often used in schools to describe a situation where a student is being called to the principal's office, usually for disciplinary reasons.

It's possible you're thinking of a book that features this phrase in its title or plot. To help me identify the book you're thinking of, could you tell me more about it? For example:

* Do you remember the author's name?

* Do you recall any details about the story, like the main character or the setting?

* Is it a children's book, a young adult book, or something else?

With more information, I can try to find the book you're looking for.