Harry Potter e-books, which just recently went on sale in March, will soon be available for free through Amazon's Kindle Lending Library System. 

Starting on June 19, Kindle owners and Amazon Prime owners will be able to borrow the digital versions of all seven of the popular Harry Potter books from their local libraries, the company today announced on its homepage.

The Amazon Kindle Library was announced in April of last year and allows Amazon Prime subscribers to borrow e-books once a month. 

[Amazon via NYT]