Prologue Books is having a 99 cent sale on their ebooks, with nearly 500 titles on sale. Genres include Science Fiction and Fantasy, Mystery/Thriller/Suspense and Literary Fiction. Those in the UK are included, too, at a price of £0.99.
There are way too many books in the sale to list here, so click the link and then pick the genre that interests you the most. You should be able to find at least a few titles that pique your interest.