This is mostly graphic inspiration. For interaction design: "Thoughtless Acts" by Jane Fulton Suri is one of the best. Pages and pages of photos of objects as

This is mostly graphic inspiration. For interaction design: "Thoughtless Acts" by Jane Fulton Suri is one of the best. Pages and pages of photos of objects as they are actually used, rather than what they were designed for, gives deep insights into use. "Design Research" by Brenda Laurel is an exhaustive collection of design methods, which you can pick from to solve almost any specific design problem. In my opinion, those two books and The Design of Everyday Things are all anyone needs to know in order to be a better interaction designer than 99.9% of professionals.