Here is a book written by the CEO of IDEO, arguably the worlds most successful design consultancy, on the subject of Design Thinking.
"Tim Brown, shows how the techniques and strategies of design belong at every level of business.
The myth of innovation is that brilliant ideas leap fully formed from the minds of geniuses. The reality is that most innovations come from a process of rigorous examination through which great ideas are identified and developed before being realized as new offerings and capabilities.
This book introduces design thinking, the collaborative process by which the designer’s sensibilities and methods are employed to match people’s needs with what is technically feasible and a viable business strategy. In short, design thinking converts need into demand. It’s a human-centered approach to problem solving that helps people and organizations become more innovative and creative."