Book excerpt: Recently, the field of pattern language has been developing in various domains. Patterns are usually expressed in sentences, along with a visual expression. One of these expressions is called a "pattern illustration" because it expresses the essence of the pattern, includes characters that express human movements and feelings, and symbolically represents a pattern that does not connect multiple scenes with arrows. Pattern illustration describes the pattern's primary content, and this helps readers understand and memorize the pattern and also motivates them to use it. But our question here is "How can we draw these pattern illustrations?" In this book, Pattern Illustrating Patterns, we have collected 28 patterns on how and what to draw and what aspects must be considered when creating pattern illustrations. We hope this book will stimulate further understanding about including pattern illustration as an approach to visual aid by those considering or creating pattern languages.