The world of the ebook is rapidly expanding, if not somewhat fractured with its multiplicity of formats and both free and proprietary platforms. Even if you don’t have access to your own personal handheld reader, you can still access ebooks and read them on any computer.
There are a number of free sites which offer ebooks to read such as Project Gutenberg (there’s even an Australian version, though admittedly the interface isn’t quite as pretty) and the Internet Archive’s Ebooks and text archive. The National Library of Australia has also published a selection of ebooks of their very own, based on material held in their collection. You should also check out your local library’s catalogue as many libraries now have ebooks available for “loan,” with access to the book expiring at the end of the loan period.
Update: Libraries Interact has compiled a list of libraries that offer ebooks to their readers – worth a look!