If you are new to Squid, the next few chapters will help you get started. First, I'll show you how to get the code, either the original source or precompiled binaries. In Chapter 3, I go through the steps necessary to compile and install Squid on your Unix system; this chapter is important because you'll probably need to tune your system before compiling the source code. Chapter 4 provides a very brief introduction to Squid's configuration file. Finally, Chapter 5 explains how to run Squid.
If you've already had a little experience installing and running Squid, you may want to skip ahead to Chapter 6.