This is the first book on which I've been the sole author, but no author works alone. Without the professional assistance of my editors, Merwyn D'souza and Reshma Raman, I would have been lost at sea. I'd hate to admit how many errors would have persisted without the expert feedback of the technical reviewers, John Colvin, Jonathan Davis, Kingsley Hendrickse, David Nadlinger, Steven Schveighoffer, and Ilya Yaroshenko. They have all helped make this a much better book than it otherwise would have been; the blame for any remaining technical errors that may surface rests squarely on my shoulders.

I'd like to offer a great deal of gratitude to all of the active members of the D community who participate in the D forums, helping both newbies and old-timers alike in overcoming confusion and solving problems. I'd especially like to thank Ali Çehreli and Adam D. Ruppe, whose own writings and posts in the newsgroups helped to clarify some issues I had in exploring corners of D I had rarely touched before writing this book. Thanks also to Walter Bright and Andrei Alexandrescu, both of whom have made a number of sacrifices to further the development of this wonderful programming language.

Finally, I could never have expended the time and energy on this book that I did without the support of my wife, Mi Kyoung. I owe her a great many missed dinners and canceled events, along with my everlasting thanks and love.