Paul Sloane, an innovation colleague, approached me a while back to write a chapter in a book he was compiling on open innovation & crowdsourcing. The book is now officially out. In it you will find articles from a wide range of experts in the area of open innovation.
Although the writing style of each author is quite different, and the points of view at times may contradict one another, the value in reading a book like this is that you will get a broad and diverse set of perspectives.
You can buy your copy on Amazon.com.