This book would not exist without the help and guidance of the team at Pearson (Sams Publishing). Thanks to Laura Lewin for constant encouragement, Olivia Basegio for her continued work on the project, and Trina McDonald for staying in contact and suggesting the book. Particular thanks go to Michael Thurston for the insightful comments and suggestions during editing. The thoroughness and clarity that were added make this a much better book.
Thanks, Amy and Natalie, for enjoying Saturday morning ballet classes, birthday parties, and other activities while I was writing.