Physical copies of titles such as "Maleficent" and "Captain America: The Winter Soldier" were unavailable for order on Amazon.com on Sunday. Digital copies of some of the movies in question were still available for pre-order.
Amazon.com did not immediately respond to a request for comment on the report. A Disney spokesman had no comment.
Amazon has been waging a battle against Hachette, the fourth-largest U.S. book publisher, over the price the online retailer can charge for ebooks. Hachette is owned by France's Lagardere.
(Also see: Hachette Defends Itself After Amazon Alleges Price Fixing)
A group called Authors United ran a two-page ad in the New York Times on Sunday, criticizing Amazon for halting pre-orders from some Hachette authors and slowing delivery of books by Hachette authors. The ad was signed by more than 900 writers, including Stephen King and Donna Tartt.
Amazon says pricing ebooks at $14.99 or $19.99 is too expensive. It argues that cheaper ebooks sell more copies and so ultimately generate more revenue and more royalties for authors.
© Thomson Reuters 2014
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