Building an app starts with a concept, and idea, a vision. If you don’t have a guiding light in mind, you’re just doing. That isn’t necessarily creating. Idea to App: The Absolute Beginner’s Guide to Making iOS Apps is a new book from Megan Holstein, who is also responsible for the website of the same name. Her book promises not to be a rehashing of the website, though; it’s billed as one that is full of fresh ideas, and a better walk-through of how to get from idea to app. To see if it accomplishes that, I decided to give it a read.