If you haven't already, check out eBook Diva, South Africa's first dedicated romance eBook website. You can purchase and download a wide range of Harlequin books, including crime novels from Black Star, main stream books from Mira, the full range of category novels, and also shorter reads for under R20.
Spice Briefs and Historical Undones are not available in book stores, and they're short enough to read in your lunch break, so they're a great way to start if you're new to eBooks.
You can also add reviews and visit the community for aspiring writers, Tales of the Diva.
(And sssshh! Don't tell anyone else, but there are also free books available for download here.)