What two books would be good in comparing similarities and differences?

I have a major English project coming up where I have to chose two books and talk about their similarities and differences. I was wondering if you could help me out and give me some titles to look at?

Thanks!

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).