1. Recommendations from fellow readers on online message forums, blogs and message boards.Mark Coker conducted a survey and the above is an abridged report of what he found. Interestingly, bestseller lists weren't a major factor in how readers discovered new ebooks. (The graphic, above, expands if you click it. It lists the various ways ebook buyers discover ebooks.)
2. New books from a reader's favorite authors.
3. Random browsing. Readers look at book covers, reviews, download free samples.
Read Mark Coker's post here: How Ebook Buyers Discover Books