Card-sized Harry Potter prequel to be auctioned

This undated image provided by Waterstone's shows an excerpt from a prequel to Harry Potter written by JK Rowling which is to be auctioned for charity The story, which is shrouded in secrecy, was penned in the past month and is just 800 words long. Her Potter prequel comes almost a year after the last book in the boy-wizard series, Harry Potter and the Deathly Hallows, hit the shelves. The latest tale will not be published but sold at a charity auction at Waterstone's flagship store in central London on June 10. The proceeds will go to English PEN, the writers' association, and British charity Dyslexia Action. (AP Photo/Waterstone's /ho)

LONDON—An 800-word Harry Potter prequel is one of 13 card-sized works to be sold at a charity auction in the British capital.

Waterstone's Booksellers Ltd. says the cream-colored A5 papers -- each slightly bigger than a postcard -- were distributed to 13 authors and illustrators, including the boy wizard's creator J.K. Rowling, Nobel Prize winner Doris Lessing, novelist Margaret Atwood and playwright Tom Stoppard.

Rowling used both sides of her card to hand-write a prequel to her seven-book Harry Potter saga, while Lessing penned a story about the power of reading. Stoppard wrote a short mystery and Atwood was due to fill out her card remotely using a robotic arm controlled by computer linkup.

Other cards were completed by children's author Michael Rosen, illustrator Axel Scheffler, graphic novelist Neil Gaiman, Lisa Appignanesi, Richard Ford, Lauren Child, Irvine Welsh, Sebastian Faulks and Nick Hornby, who plastered his card with a collage.

The cards will go on sale at the "What's Your Story?" auction at Waterstone's flagship store in central London on June 10. The proceeds are to go to English PEN, the writers' association, and the British charity Dyslexia Action. Copies of the cards will be collated into a book to be made available at the bookstore and online in August.

Organizers refused to comment on the content of Rowling's Harry Potter prequel, but Hogwarts fans hoping for another book to add to their collection may be disappointed by her signoff.

"From the prequel I am not working on -- but that was fun!" Rowling wrote.

Rowling has previously said she had no plans to write another Potter novel, but in December she sold a handwritten, leather-bound book of fairy tales she described as drawing on the series' themes, for nearly $4 million at auction. The money went to The Children's Voice, a charity Rowling co-founded in 2005.