Tim Cook
Apple CEO Tim Cook. Apple

Because of a lawsuit over e-book prices that was settled years ago, you may have credits that can be applied to purchases on Amazon waiting in your Amazon account.

To check if you have credits, simply click this link.

But even if you have credits from the settlement, you have to use them by Saturday — today — or they’ll expire.

Last March, the Supreme Court declined to hear a long-running case about Apple price-fixing e-books, making an earlier $400 million settlement final.

For the past year, Apple’s been paying it out. You might have credits for free e-books waiting in your inbox — but, as a reminder, they expire on Saturday.

Here’s how it works:

  • You’re eligible if you bought an e-book from a large publishing company between April 1, 2010, and May 21, 2012.
  • Those books could have been purchased not just from Apple’s iBooks, but Amazon, Barnes and Noble, and Kobo.
  • Those credits will be automatically applied to the account where you bought the e-books unless you…