As digital technology keeps progressing at a dizzying pace ebooks are now a viable and enjoyable alternative to the much loved, traditional kind.
There are a whole host of readers available that make ebook reading a real pleasure. The site eBooks.com is one of the world's largest and most well established online sellers of these products. (Interestingly, they're based in Claremont, Western Australia.)
They have a massive range in every conceivable category. So check them out if you want a quality ebook available instantly for your reading device.
Just on that subject: Because of the encryption the site uses for security, some of the titles can't be read on Kindles. (Kindle Fire, however, is fine.) For more info on this go to the Reader Devices section linked from the main page.