Useful recourses

Key Agile documents and publications

Agile basics

Scrum guide is the foundation of Scrum. It is an ultimate source of information and about the framework and its practical application.

Agile manifesto is a simple document containing 4 values and 12 principles. It's a a guiding roadmap for all Agile methodologies

Very useful glossary of most popular Scrum, Extreme Programming, Lean and other Agile definitions, techniques and methodologies