There is scarcely a role that does not require us to understand, analyse and present data. Charts, graphs and maps are everywhere. However, many of these data visuals leave the viewer bewildered, confused or (even worse) with an incorrect understanding of the data. In contrast, if designed well, data visualizations help us make sense of data and communicate our insights better.Bringing a clear classroom teaching style, which has helped hundreds of data wranglers, to this book, the author walks you through the myriad ways that graphs can mislead, helping to spot visualization traps and prevent misinterpretations. She illustrates core design principles for creating truthful and effective data visualizations, assisting you to master the art and science behind creating impactful and accurate graphs.Packed with examples to clearly explain the dos and don'ts of data visualization and backed by empirical research, this book will transform the way you create and analyse graphs and charts.