Oyster is perfect for trying out books you might never purchase, but you'll still need to buy new releases and other popular titles elsewhere.
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While the series has been available for digital purchase since 2011, members of the book-streaming service now can get their Potter fill at no additional charge.
There are three similar book subscription services on the market -- which is right for your reading habits?
For $10 per month, you can read as many books as you want in this beautiful app.
The monthly subscription service that lets you read an unlimited number of e-books is now available on any desktop or mobile browser.
The popular e-book subscription service is now available on just about every device.
Scribd and Oyster's all-you-can-read e-book subscription services add 'Big 5' publisher's backlist titles.
Parents, take note: the "Netflix of books" has added a generous selection of children's titles, including dozens from Disney Publishing.
Gryffindor may have just found its new mascot. In celebration of World Book Day, "Harry Potter" author J.K. Rowling tweets an adorable image of a puppy decked out in Gryffindor garb.
E-book and audiobook subscription service Scribd now offers unlimited digital comic books, too.