Managing As DesigningEditors: Richard Bolland and Fred Collopy

The Back of the Napkin
by Dan Roam
The Art of Innovationby Tom Kelley

ZAG
by Marty Neumeier

Designing Interactions
by Bill Moggridge
(in process of reading this one)
Let me know if you're interested in any of these! Maybe we could exchange at the next meeting of our group!