The following are PRINCE2, Agile and PRINCE2 Agile sources that you can refer to for further information.
PRINCE2 resources
PRINCE2: www.axelos.com/best-practice-solutions/prince2
PRINCE2.com: www.prince2.com/usa
PRINCE2 Agile resources
PRINCE2 Agile, Keith Richards, AXELOS (2015): www.axelos.com/store/book/prince2-agile
Taking Agile to PRINCE2, Raconteur (2015), http://raconteur.net/business/taking-agile-to-prince2
General information on Agile
Agile Alliance: www.agilealliance.com
Agile: An Executive Guide – Real Results from IT Budgets, Jamie Lynn Cooke, IT Governance Publishing (2011): www.itgovernanceusa.com/shop/p-351-Agile-an-executive-guide.aspx#.uc7geqwlfg0
Agile Connection: www.agileconnection.com
AgileKiwi: Practical Agile software development: www.agilekiwi.com
Agile Manifesto: www.agilemanifesto.org
AgileSoftwareDevelopment.com: www.agilesoftwaredevelopment.com
Alistair Cockburn: http://alistair.cockburn.us
Everything You Want to Know about Agile, Jamie Lynn Cooke, IT Governance Publishing (2012): www.itgovernanceusa.com/shop/p-549-everything-youwant-to-know-about-Agile.aspx
The Power of the Agile Business Analyst: 30 Surprising Ways a Business Analyst Can Add Value to Your Agile Development Team, Jamie Lynn Cooke, IT Governance Publishing (2013): www.itgovernanceusa.com/shop/p-1379-the-power-of-the-agile-business-analyst.aspx
Specific Agile methods
Overview
A Practical Guide to Seven Agile Methodologies, R. Coffin and D. Lane: Part One: www.devx.com/architect/article/32761; Part Two: www.devx.com/architect/article/32836
Scrum
Scrum alliance: www.scrumalliance.org
Glossary of Scrum Terms, V. Szalvay, Scrum Alliance, Inc. (2007): www.scrumalliance.org/community/articles/2007/march/glossary-of-scrum-terms
Scrum and Agile presentations by Mike Cohn of Mountain Goat Software (various dates): www.mountaingoatsoftware.com/presentations
DSDM
What Is DSDM?, M. Clifton and J. Dunlap (2003): www.codeproject.com/kb/architecture/dsdm.aspx
DSDM Explained, R. Davies, JAOO (2004): www.agilexp.com/presentations/DSDMexplained.pdf
FDD™
Feature-Driven Development: An Overview: www.tarrani.net/mike/docs/fddoverview.pdf
Feature-Driven Development™ (FDD™) and Agile Modeling, S.W. Ambler: www.agilemodeling.com/essays/fdd.htm
Lean
Lean Primer, C. Larman and B. Vodde (2009): www.leanprimer.com/downloads/lean_primer.pdf
Leading Lean Software Development: Results Are Not the Point, Poppendieck LLC (2009): www.poppendieck.com/pdfs/llsd_intro.pdf
XP™
eXtreme Programming™: A Gentle Introduction: www.extremeprogramming.org
Kanban (overview): www.crisp.se/kanban
Kanban and Scrum: Making the Most of Both, H. Kniberg and M. Skarin (2010): www.infoq.com/minibooks/kanban-scrum-minibook
Scrum-ban: http://leansoftwareengineering.com/ksse/scrum-ban/
Scrumban: Essays on Kanban Systems for Lean Software Development, C. Ladas, Modus Cooperandi Press (2009)
Scrumban: Taking Scrum Outside Its Comfort Zone: www.slideshare.net/yyeret/scrumban-taking-scrum-outside-its-comfort-zone
RUP®
What Is the Rational Unified Process®: www.ibm.com/developerworks/rational/library/content/RationalEdge/jan01/WhatIstheRationalUnifiedProcessJan01.pdf
Agile Modeling and the Rational Unified Process® (RUP®): www.agilemodeling.com/essays/Agilemodelingrup.htm
AUP
The Agile Unified Process (AUP): www.ambysoft.com/unifiedprocess/Agileup.html
Crystal methodologies: http://alistair.cockburn.us/crystal+methodologies
Scaled Agile Framework® (SAFe®)
Scaled Agile Framework® (SAFe®): www.scaledagileframework.com
Introducing the Scaled Agile Framework®: www.cio.com/article/2936942/enterprise-software/introducing-the-scaled-agile-framework.html
Large-Scale Scrum (LeSS) Framework
Introduction to LeSS: http://less.works/less/framework/introduction.html
Nexus
Nexus Framework: www.scrum.org/Resources/The-Nexus-Guide
Scrum of Scrums
Agile Can Scale: Inventing and Reinventing SCRUM in Five Companies: www.controlchaos.com/storage/scrum-articles/Sutherland%20200111%20proof.pdf
Disciplined Agile Delivery (DAD)
The Disciplined Agile Framework: www.disciplinedagiledelivery.com/agility-at-scale/disciplined-agile-2/
Industry research on Agile
9th Annual State of Agile Development Survey, VersionOne: http://info.versionone.com/state-of-agile-development-survey-ninth.html
Selected Agile case studies
Agile Coaching in British Telecom, L. Meadows and S. Hanly (2006): www.agilejournal.com/articles/columns/column-articles/144-agile-coaching-in-british-telecom
Rolling Out Agile in a Large Enterprise, G. Benefield Proceedings of the 41st Annual Hawaii International Conference on System Sciences (HICSS) (2008): http://dl.acm.org/citation.cfm?id=1334591