WASHINGTON — Harry Potter fans: Beware of the Internet!

The last installment of the boy wizard's saga is supposed to be kept a deep secret until Saturday, but photographs and scanned copies of each page of the unreleased book -- both real and fake -- are already circulating all over the Web.

Pictures of the pages 1-495 can be downloaded off several torrent sites, part of a peer-to-peer filing-sharing platform. Some materials have been hosted on PhotoBucket.com, a Web site that shares pictures and videos on networks like MySpace, Craigslist and Xanga. One personal Web page is listing plot summaries with scanned images of the text.

For months, Scholastic has been asking people on various sites to take down material that might spoil the plot of "Harry Potter and the Deathly Hallows."

The plot thickened Monday, with the publisher serving a subpoena to San Jose-based Gaia Interactive, which runs a social networking site, to learn the identity of the user who allegedly posted the book. "The main thing is to keep spoilers from ruining all the fun for the fans," said Scholastic spokeswoman Kyle Good. "They're all looking forward to their midnight parties on Friday."