Acknowledgements
I am most grateful to a number of anonymous reviewers for their constructive
criticism and suggestions. I am also indebted to the many authors whose books
I have consulted over the years. My thanks are due to Eur Ing Professor Peter
Holmes for encouraging me to write this book, to Allan Waters for permission
to use some of his problems, to the many students with whom I have had the
pleasure of working and whose questions have helped form this book and not
least to my wife Janice for her patience in the face of deadline-induced
irritability.