At last, Harry Potter's adventures are available electronically. The seven novels about J.K. Rowling's boy wizard are for sale as e-books and audio books on the author's Pottermore website, the site's creators announced Tuesday. The books are currently available in English, in U.S. and U.K. editions, priced at $7.99 or 4.99 British pounds for e-books and $29.99 or 17.99 pounds for audio versions. The site says French, Italian, German and Spanish editions will follow in the coming weeks. The books are available only through the website, which says they are compatible with major electronic e-readers, including Amazon's Kindle, Sony's Reader and Barnes & Noble's Nook, as well as with tablets, mobile phones and Google's Play digital store. The Harry Potter novels have sold 450 million copies, but Rowling for years resisted making the books available in digital form,