Until 2001, most software was developed using the traditional techniques involving lots of planning, and a slow, expensive, comprehensive approach named "waterfall." More than 55% of these development projects failed in significant ways. This is well documented. During the 1990's, a new "lightweight" way of developing software emerged. In 2001, Ken Schwaber, Jeff Sutherland, and other leaders of the lightweight processes met and published the Agile Manifesto, founded the Agile Alliance, and the Scrum Alliance to spread these ideas, and today several million programmers and IT managers use Agile and Scrum methods. The success rate for projects using Agile processes is greater than 80% and rising. The productivity gain vs traditional "waterfall" methods was over 100% on many of these projects. This book summarizes the Agile and Scrum software development method, which allows creation of game-changing, powerful software for businesses and their customers, in just 30 days. It summarizes the authors 15 years of experience implementing Agile software, for all managers, IT managers, and programmers.