The seven novels about J.K. Rowling's boy wizard are for sale on the author's Pottermore website from Tuesday.
The books are currently available in English, in U.S. and U.K. editions. The site says French, Italian, German and Spanish editions will follow in the coming weeks. The books are available only through the Pottermore site, which says they are compatible with major electronic e-readers.
Rowling for years resisted making her work available in digital form.
The whole Pottermore site, which combines elements of computer games, a social network and an online store, opens in early April.
Its launch was delayed after testing with a limited number of users showed changes were needed.
