Installing and using program like e-Books to read via internet

I request for IT support and advice please. This may sound trivial, but your inputs are highly important. You see, my computer’s technical specifications are not that good. I wish to install and use a program like e-Books, so that I could read via the internet and my computer.
My computer contains security features like McAfee and Norton Antivirus, Firewall, Avasta among others.
It also runs through the proxy server. Is it possible to download usable software like the e-Books? Or do I need to purchase a hardware or software to back up my computer?
