Generally I prefer to buy print books rather than ebooks. However, I own a NOOK ebook reader and I do buy ebooks, especially when I can find them at a low price. For discounted ebooks I use BookBub.
BookBub finds heavily discounted ebooks, audiobooks, and even print books. While I buy all my ebooks from Barnes & Noble, BookBub links to ebooks from all major retailers: Amazon, Apple, B&N, Google, and Kobo. In the BookBub settings, you can choose the formats you want and also the retailer(s).
Continue reading Website Recommendation: BookBub