We wish to express our gratitude to Ayşen Karabağ and Necmiye Türkan for providing us with invaluable advice and materials. Our special thanks are extended to Burcu Turner, who prepared wonderful quizzes and midterms, many of which have been used as tasks in the book. We would also like to thank Josh Carney for tolerating our never-ending questions. Additional thanks to everyone who has previously worked in the Materials Development Unit.
Our continuing thanks to Steve Riva, and especially to Beth Doğan, for their invaluable proofreading of the material. The book is undoubtedly better for their efforts.
Finally, we are grateful to all our colleagues for their encouragement and continuous support. We believe that without their support, it would not have been possible to prepare this book.