Branded Interactions Marco Spies

Contextual Design: Defining Customer-Centered Systems Hugh Beyer, Karen Holtzblatt

Subject To Change: Creating Great Products & Services for an Uncertain World Peter Merholz, Todd Wilkens, Brandon Schauer, David Verba

Service Design Book Colin Rudd, Vernon Lloyd

Sketching User Experiences: Getting the Design Right and the Right Design Bill Buxton

Universal Principles of Design William Lidwell, Kritina Holden, Jill Butler