I am most sincerely indebted to Gavin Brown, Juan Rodríguez, and Kami Kountcheva for scrutinizing the manuscript and returning to me their invaluable comments, suggestions, and corrections. Many heartfelt thanks go to my family and friends for their constant support and encouragement. Last but not least, thank you, my reader, for picking up this book.
Ludmila I. Kuncheva
Bangor, Gwynedd, UK