Many books discuss Agile from a theoretical or academic perspective. Becoming Agile takes a different approach and focuses on explaining Agile from a case-study perspective. Agile principles are discussed, explained, and then demonstrated in the context of a case study that flows throughout the book. The case study is based on a mixture of the author's real-world experiences. Becoming Agile also focuses on the importance of adapting Agile principles to the realities of your environment. In the early days of Agile, there was a general belief that Agile had to be used in all phases of a project, and that it had to be used in its purest form. Over the last few years, reputable Agile authorities have begun questioning this belief: We're finding that the best deployments of Agile are customized to the realities of a given company.