David Sparks' book is officially official. I've had mine for about a week and it's great. If you thought paper books were dead, this book proves otherwise. It's printed on high-quality paper with full color images. There are QR Codes to look-up any apps he mentions. Even if you're Scott Forstall, get the book just for the high-quality content. I plan to give this as a gift to several people this holiday. It's not just for suit-wearing executives. I think a good subtitle would be "Making things with the iPad."