For the college kids that might read this, don’t keep your textbooks in your car. On the day of my finals I had about 6 textbooks I was gonna sell after my finals, I left the books in my car while I took my tests. Came back to find someone broke my window out to steal the textbooks. Cop told me that it’s very common and unlikely they will catch the guy, so I was out ~$700, which was huge as a college student.
If it's empty, you can cut a hole in the bottom, for example, clean the inside and make some type of lid, to close it again. It's not like anybody will be inspecting it in detail ;)