The book "Agile! The Good, the Hype and the Ugly" by Bertrand Meyer provides a review of agile principles, techniques and tools. It explores the agile methods Extreme Programming, Lean Software, Scrum and Crystal and provides suggestions on what to use or not to use from them, based on software engineering principles and research and personal experience of the book author.
In this updated classic on Agile software development, Alistair Cockburn adds reflections from five more years of practice and research. InfoQ brings you Chapter 1, in which he compares software development with another team-cooperative game - rock climbing - and two common comparison partners, engineering and model building, in order to explore alternate ways of thinking about the work we do.