To understand more about the passion that drives software developers I would recommend “Dreaming in Code” by Scott Rosenberg.
Dean Leffingwell provides an excellent insight into enterprise level Agile software development in his new book “Scaling Software Agility”. This is a must read for anyone attempting to implement Agile development on a large scale.
Agile Axioms is a feature at Working Software Every Two weeks which provides interesting rules or principles to be considered with Agile projects.
