Acknowledgements

In this second revised edition, much of the material from the original COLT book is included. I remain grateful to many people who contributed to the preparation of the first edition and who were acknowledged in the book at that time. I would like to reiterate my thanks to those who played particularly important roles, and this includes Victoria Murphy, Patsy Lightbown, Roy Lyster and Leila Ranta. My deepest thanks go to Maria Fröhlich, my co-author of the first edition.