This book was only possible because four intrepid computer scientists decided they wanted a better language six years ago. So, I would like to thank Alan, Jeff, Stefan, and Viral for giving Julia to the world. The world of scientific computing has changed drastically as a result.

Working in Julia over the last three years has been one of the most enjoyable experiences in my professional career. A large part of this joy is due to the people who inhabit this community. It is a collection of smart and engaged scientists and developers who have taught me far more than programming languages. A big "thank you" goes to the entire Julia community, which is responsible for all the buzz that Julia has received.

Many thanks are due to the reviewers who generously provided their time to improve this book. While all the deficiencies remain my own, this is now a much better product thanks to their efforts.

Writing a book turned out to need many more late nights than I would have thought necessary. So, I would like to give a big shout-out to Vaishali and Ahan for keeping me sane and well-fed during this process.