This document provides an introduction to the book "The Language of School Design: Design Patterns for 21st Century Schools". It discusses the need for a common design vocabulary and pattern language for schools to facilitate innovation. The book presents 25 initial design patterns identified from best practices in hundreds of innovative school designs. However, these are only a beginning, as the goal is to create a living pattern language that can continually be added to and refined by all school stakeholders to support the creation of optimal learning environments.