https://www.coursera.org/course/design
http://www.amazon.com/Dont-Make-Me-Think-Usability/dp/032134...
And, finally, if you want to do some usability experiments and testing:
http://www.amazon.com/Handbook-Usability-Testing-Conduct-Eff...
http://www.amazon.com/Naked-Statistics-Stripping-Dread-Data/...
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https://www.coursera.org/course/design
http://www.amazon.com/Dont-Make-Me-Think-Usability/dp/032134...
And, finally, if you want to do some usability experiments and testing:
http://www.amazon.com/Handbook-Usability-Testing-Conduct-Eff...
http://www.amazon.com/Naked-Statistics-Stripping-Dread-Data/...