LONDON -- Questions about quidditch? Fuddled about the phoenix? Answers will be provided when J. K. Rowling reads from her next Harry Potter adventure at the Royal Albert Hall on June 26 and does a live interview about the book, both events to be broadcast simultaneously on the Web, organizers said yesterday.

At the event, hosted by actor Stephen Fry, Rowling will read from Harry Potter and the Order of the Phoenix -- which is to be released June 21 -- before taking questions about junior wizard Potter from the audience and from fans online.

The Web site address is www.msn.co.uk/harrypotter

The companies that made the Big Brother reality series for TV have been commissioned by Rowling's British publisher, Bloomsbury, to film the event.

The Webcast, which is free, is to begin at noon. Microsoft said it has the potential to reach children in 34 countries in 18 different languages.

Before the event, children are invited to submit questions about Harry to the Web site. Fry will put some of them to Rowling live and others will be taken live from the Internet during the Webcast.

The Webcast will be available for viewing in archive form for seven days after the event.

Peter Cowley, director of the parent company of the interview film crew, said the event "is an example of the Web doing more than television could ever do -- beaming out a hugely anticipated event directly to a worldwide audience, free of charge."

Harry Potter and the Order of the Phoenix is more than 255,000 words long, compared with 191,000 words in Rowling's fourth Potter book, Harry Potter and the Goblet of Fire. Rowling's four published titles have sold an estimated 192 million copies worldwide in hard and soft cover, and the books have been published in at least 55 languages.