This document provides an introduction to home beer brewing. It discusses why home brewing is a fun hobby that allows for creativity and experimentation. Home brewing of beer is legal in most US states if it is for personal use and not resale. The document defines some common brewing terms like alcohol by volume, original gravity, final gravity, and international bitterness units. It also explains the differences between common beer styles like ales, lagers, bocks, and porters. The introduction aims to give new home brewers the basics needed to understand the brewing process.