It really depends on the major. I'm a journalism major and I usually only spend about $200-$300 on books a semester but I have friends in engineering that spend upwards of $1000. So I would probably say between $1600 and $8000 dollars over the course of your college career. But that's all changing now because of the whole rental thing, and I actually get a lot of that money back selling them after a semester is over.

I've spent $300-400 so far during my first semester as an engineer. It depends your major and elective classes

Maybe about 500 a semester it depends on your major though english majors spend a lot for books