The document outlines the goals and contents of a book about HDInsight, Microsoft's Hadoop distribution. The book aims to provide an overview of Hadoop, describe how to deploy HDInsight on-premise and on Azure, and provide examples of ingesting, transforming, and analyzing data with HDInsight. Each chapter is summarized briefly, covering topics like Hadoop concepts, installing HDInsight, administering HDInsight clusters, loading and processing data in HDInsight.