No. If you’re learning with the current year’s version, you can simply complete your studies with that same version. When next year’s book comes out, you are not required to purchase the new version. Remember, the content is not changing much each year and if there are changes, we’ll add the necessary Addendum to help you stay updated.
Bottom line: Don’t stress the new textbook versions for courses. We feel it’s much more important to get started with studies than worrying about yearly textbook changes.