Design of Experiments: Statistical Principles of Research Design and Analysis
The exercises are a great strength of the book.  I think the difficulty level, the amount of real data, and the required computer usage are all on target.I find the book well written, and useful in both a teaching context as well as a consulting one.  I find his narrative style in the text, and development of mathematical structures in an appendix at the end of each chapter desirable from a teaching standpoint.  The narrative text sets the stage for the mathematical treatment...Kuehl has put the right emphasis on the use of a computer.