I found“Lean UX” a comprehensive and very helpful book. The book provides a clear departure from a more traditional way of thinking around the inclusion of user experience/interaction design in product development. In Lean UX, Jeff Gothelf stresses the importance of ‘collaborative design’, getting all stakeholders involved as early in the process as possible. He makes a strong case for cross-functional product teams which are continuously looking to validate certain assumptions, developing products iteratively and learning along the way.
Lean UX is a set of principles based on the agile methods of the ‘Lean Startup’, where much of the focus is brought to the present. Instead of throwing design deliverables over the wall, teams accept that a final design can’t be created up front, and believe the answers will emerge as hypothesises are tested through incremental Minimal Viable Products (MVPs).