Advice Needed for SAT Subject Test

Hi, I am studying for subject tests for chem, bio, and math level 2. I have few questions. I am buying barron’s books and I am confused which versions to buy Is there a difference between 1 edition older or newer? Also I am so paranoid about buying the ebook version or just the book. First because I will be buying kaplan books as well with princeton review. They are cheaper on kindle. I am also getting a kindle paperwhite 3 on June 10-12. I am wondering if I should just buy the paperback or go with the kindle versions. I have been deciding on this a lot instead of stuyding…lol…something is messed up with me I wont be able to relax unless I am able to get the kindle. Please advise. Thanks

Use the medium … electronic or paper … which you are most comfortable with. I’d go with the books. There’s only so much you can cover in a week or two anyway.