I would like to thank the following people for their technical reviews and input on the book: Felix “FX” Lindner, Sebastian Krahmer, Dan Rosenberg, Fabian Mihailowitsch, Steffen Tröscher, Andreas Kurtz, Marco Lorenz, Max Ziegler, René Schönfeldt, and Silke Klein, as well as Sondra Silverhawk, Alison Law, and everyone else at No Starch Press.