Photos purporting to be every page of the unreleased "Harry Potter and the Deathly Hallows" appeared on U.S. video site YouTube and other Web sites Tuesday.

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Scholastic Corp., the book's U.S. publisher, and Bloomsbury Publishing PLC, the book's British publisher, would not confirm if any of the material was authentic.

The J.K. Rowling book -- the seventh and final installment in the series -- is slated to go on sale at 12:01 a.m. Saturday.

Scholastic got a subpoena against Gaia Interactive, a San Jose, Calif., social-networking site, after it argued a posting in someone's personal profile contained material that infringed on copyrights held by Scholastic and Rowling, The Wall Street Journal reported.

A Gaia spokesman said the user complied with the subpoena, removing the material from the site, and has been banned from the site for 14 days.

Scholastic is printing a record 12 million copies of the book, many of which have already been shipped.