Keith Sawyer, the author of Group Genius, has another great book out–Zig Zag: The Surprising Path to Creativity. Keith is a giant in the field of creativity research. His Group Genius blew up the notion that brainstorming led to more creativity.
Zig Zag will show you how creativity happens.
Check out his book site:
http://ascc.artsci.wustl.edu/~ksawyer/zigzag/
Buy the book here: