Kevin Callahan is a developer, designer, and principle of Interaction Agility. He lives in Maine and leads workshops in the New England area.

Listen to his series on Designers and Agile Teams:

• 128 Designers and Agile: What is a Designer?
• 129 Designers and Agile: When Heroic Prototyping Wags the Dog
• 130 Designers and Agile: Principles to getting Great Design Results