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.

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.