First of all: I'm a new teacher. First year. In my school students have full access to the school between classes and apparently someone snuck into my classroom while I was out (most teachers keep their rooms unlocked) and walked off with one of my teacher edition textbooks. I don't grade homework for correctness or use the text as a source for tests or quizzes, so there is no significant advantage to the person who stole it. I have announced the theft in my classes and discussed the futility of taking the book and expressed an expectation that it will show up again when the person who has it either realizes they took it by mistake (hah!) or their guilt catches up with them. A few weeks later: no book. Can anyone think of a good strategy to either flush the culprit or induce him/her to return it? I don't want to be perceived as someone on a witch hunt, but I don't want it to seem like I don't care either. Thanks!