At Faber-Ludens Institute, we often refer to the books included in this Listmania. Each book cover one important aspect of Interaction Design: tools, methods, techniques and philosophical concerns. I would like to emphasize the following 4 books, that I reccomend to my students and anybody that is begining on the field:
The order is significant. From left to right, one could go from basic notions to advanced issues. Each book increases the critical content, requiring the reader to think more about it.