Need help picking an E-reader

What it will be used for. I'm a college student, so i would want the ability to read college textbooks. I know most of them can do that, but ive never used one before, so i don't know how well they do that task. I'm not looking for an ipad, i get distracted easily wih apps and features, i just want to read and maybe take notes and look up words.

Any suggestions? And please explain why you suggest that. THANKS!