These books refuse to be categorized.  Follow the links down the rabbit hole if you wish to sample my notes.

• Derby, Esther, and Diana Larsen. Agile Retrospectives: Making Good Teams Great. Raleigh, NC: Pragmatic Bookshelf, 2006. Print.
• Rasmusson, Jonathan. The Agile Samurai: How Agile Masters Deliver Great Software. Raleigh, NC: Pragmatic Bookshelf, 2010. Print.
• Langr, Jeff, Tim Ottinger, and Susannah Pfalzer. Agile in a Flash: Speed-learning Agile Software Development: Agile Cards for Agile Teams. Raleigh: Pragmatic Bookshelf, 2011. Print.
• Cohn, Mike. User Stories Applied: For Agile Software Development. Boston: Addison-Wesley, 2004. Print.