Thank you to everyone who works on Racket, especially the core team who encouraged me to start on this book—Matthew Flatt, Robby Findler, and Sam Tobin-Hochstadt.
Thank you to Matthew Flatt for writing the foreword, and indirectly suggesting the title with his lecture Turning a Tower of Babel into a Beautiful Racket.
Thank you to Danny Yoo for making his bf tutorial Fudging Up a Racket, and his ragg parser generator, available under an open license so they could be adapted for this book.
Thank you to Eric Wastl for letting me adapt his Some Assembly Required puzzle as the wires tutorial.
Thank you to Atticus Bones for letting me adapt some of his algorithmic design concepts for the cover illustration.
Thank you to the many readers who have sent in comments and corrections during this book’s development.