This book fills a huge gap in usability testing resources. It gives practical, real-world guidance on how to actually perform the gamut of usability testing, from discussion of advantages and disadvantages of different approaches to almost step-by-step suggestions on how to go about it - recruitment, physical setup, planning, preparation, analysis, reporting. Case studies, samples, templates, and questionnaires abound. The issues she discusses in international testing are especially interesting, although not by any means exhaustive - more like pointers to more information, which apparently would be voluminous.
Every budding Ux evaluator/designer should have this book on their shelf.