There are plenty of books that try to teach you how to use iPhone or write code for it. But these 3 books teach you how to market your app once you have developed it:

iPhone and iPad Apps Marketing: it teaches you how to develop the right strategy for your app, how to market it, and even promote it using social media.

Starting an iPhone Application Business For Dummies: if you are a beginner, this book is going to give you the information you need to start with your first app. Don’t let the name fool you. It has plenty of information on pricing, marketing, and ways to generate buzz for an app.

The Business of iPhone App Development: a very informative book that shows you how to maximize your opportunity with each app. Covers social media and PR as well.

If you are a hardcore developer or have never marketed an iPhone or iPad app in the past, the above books can give you a good head-start.

There are plenty of technologies that you can take advantage of to build a Web 2.0 business. Some are more popular than others, but as long as you have a real business plan and know exactly how you are going to execute it, there is no reason you can’t build a successful online startup. If you just happen to crave more knowledge about some of those top technologies around, here are 6 books that you should read:

Professional WordPress: if you want to go beyond what other books have to teach about Wordpress and learn more advanced topics such as code manipulation, this book has you covered.

Building Social Web Applications: one of the best books to read if you want to get started with app development in the world of social media. The book is designed to give you an overview of what it takes to build a successful social web app. Think of it as social media development 101. Great way to learn how to build and expand your business.

Essential Facebook Development: Facebook is a gold mine for those who want to develop innovative apps for it. There are plenty of people who are making a whole lot of their revenue off of their Facebook apps. This book teaches you how to get started with the process and what you need to know to understand the technology better.

Twitter API – Up and Running: the one and only book you need to read to get a solid understanding for the Twitter platform. Twitter API is going to expand even further in the future, and the community is not going to slow down anytime soon. So you may as well take advantage of it while you can.

Cocoa Touch for iPhone OS 3: a complete iPhone development book that gets you familiar with what you need to know to develop an iPhone app. The future is mobile, and the iPhone platform is one exciting platform to be a part of.

Hello, Android: Android is yet another one of those exciting platforms to be a part of. If you have been paying attention to some of those commercials on TV, you have probably heard about the rise of the Droid. More killer Android phones are on the way, which means there are more opportunities for you to build business.

The above 6 books work for both entrepreneurs and developers. They certainly give you enough knowledge to be dangerous.