We’re overwhelmed by data. It’s everywhere and being collected at a fantastic rate and stored at substantial cost. But we’re not necessarily getting value from that data, though there is significant value in it, if only we could understand it. All is not lost. Over the last decade, a new category of technology based on graphs has moved from obscurity to prominence. Graphs have come to underpin everything from consumer-facing systems like navigation and social networks to critical infra‐ structure like supply chains and power grids. These important graph use cases have reached a common conclusion: applying knowledge in context is the most powerful tool that most businesses have. A set of patterns and practices called knowledge graphs has been emerging to help understand data in context, where the context is represented as a graph of connected data items. With knowledge graphs, there is hope that you can distill business value from data. This book is an attempt to show how it can be done.