Amazon and HarperCollins, one of the world’s largest book publishers, have reached an agreement on a multi-year contract for both print and digital editions.

The particulars of the deal weren’t disclosed, but the arrangement echoes a deal Amazon struck with Simon & Schuster in October, with Hachette in November, and with Macmillan in December. These companies represent four of “The Big Five” English-language publishing companies — Penguin Random House being the fifth.

Amazon accounts for a massive chunk of total U.S. book sales, and publishers have struggled with the retail giant’s steep discount pricing and ever-expanding market share.

According to the Wall Street Journal, the deal calls for HarperCollins to decide the retail prices of its digital books, with incentives to provide lower prices to consumers.

The move guarantees no interruptions in online sales for HarperCollins, which is currently prepping for the release of Harper Lee’s Go Set a Watchman, widely expected to be a blockbuster title for the company.

The new agreement with HarperCollins should go into effect this week.