The following books are highly recommended in the area of application development.
Business and Project Management
The following books are highly recommended in the area of business and project management:
Upstarts!: How GenY Entrepreneurs are Rocking the World of Business and 8 Ways You Can Profit from Their Success by Donna Fenn (New York: McGraw-Hill, 2009)
For a different spin from this book (slightly more technical and legal), see The Business of iPhone and iPad App Development: Making and Marketing Apps that Succeed by Dave Wooldridge and Michael Schneider (New York: Apress, 2011)
Agile Game Development with Scrum by Clinton Keith (Boston: Addison-Wesley Professional, 2010)
Game Development Essentials: Game Project Management by John Hight and Jeannie Novak (Florence, Kentucky: Delmar Cengage Learning, 2007)
The Game Producer's Handbook by Dan Irish (Florence, Kentucky: Course Technology PTR, 2005)
iOS Programming
The following books are highly recommended in the area of iOS programming:
iPhone Programming: The Big Nerd Ranch Guide by Joe Conway and Aaron Hillegass (Boston: Addison-Wesley Professional, 2010)
Cocoa Design Patterns by Eric M. Buck and Donald A. Yacktman (Boston: Addison-Wesley Professional, 2009)
Design and Art
The following books are highly recommended in the area of design and art:
For design and project brainstorms, see iPhone 4 Made Simple by Martin Trautschold, Gary Mazo, and Rene Ritchie (New York: Apress, 2010)
Tapworthy: Designing Great iPhone Apps by Josh Clark (Sebastopol, California: O'Reilly Media, 2010)
A Theory of Fun for Game Design by Raph Koster (Sebastopol, California: Paraglyph Press, 2004)
For an amazing repertoire of design ideas, see David Perry on Game Design: A Brainstorming ToolBox by David Perry and Rusel DeMaria (Hingham, Massachusetts: Charles River Media, 2009)
The Design of Everyday Things by Donald A. Norman (New York: Basic Books, 2002)
The Design of Design: Essays from a Computer Scientist by Frederick P. Brooks, Jr. (Boston: Addison-Wesley, 2010)
From Idea to App: Creating iOS UI, Animations, And Gestures (Voices That Matter) by Shawn Welch (Berkeley, California: New Riders Press, 2011)
Marketing
The following books are highly recommended in the area of marketing:
Social Nation: How to Harness the Power of Social Media to Attract Customers, Motivate Employees, and Grow Your Business by Barry Libert (Indianapolis: Wiley, 2010)
The Old Rules of Marketing are Dead: 6 New Rules to Reinvent Your Brand and Reignite Your Business by Timothy R. Pearson (New York: McGraw-Hill, 2011)
Designing Brand Identity: An Essential Guide for the Whole Branding Team by Alina Wheeler (Indianapolis: Wiley, 2009)
The Zen of Social Media Marketing: An Easier Way to Build Credibility, Generate Buzz, and Increase Revenue by Shama Kabani (Dallas: BenBella Books, 2010)
Likeable Social Media: How to Delight Your Customers, Create an Irresistible Brand, and Be Generally Amazing on Facebook (& Other Social Networks) by Dave Kerpen (New York: McGraw-Hill, 2011)