In the hit or miss world of buying reference books, this one is a big hit! It's a very practical step-by-step guide to creating an iPhone app and -- most important -- THE EXAMPLES WORK. From nuggets on using -webkit to get the look and feel into the phone user's comfort zone, using JQuery to accomplish self-calling pages so you don't keep activating Safari over and over, to showing you the steps to prepare a webapp to go into the iPhone's icon menu either directly or through iTunes. This is the good stuff. Every programmer I've shown the book to so far immediately orders one.