Conceptual Blockbusting: A Guide to Better Ideas
by James L. Adams
Publisher: Perseus Books Group; 4th edition (October 23, 2001)
Very popular book with techniques and exercises to develop your problem-solving ability.
Creative Growth Games
by Eugene Raudsepp, George P. Hough Jr
Publisher: Perigee Trade (August 8, 1980)
Mental gymnastics to exercise the brain. Good because of the informative text commenting on the games.
Creativity for Graphic Designers
by Mark Oldach
Publisher: North Light Books (April 2000)
Oldach’s book is about the process, not the product. “Designers have a responsebility to do what they are paid to – design …. To many designers use the their computers for a substitute for thinking”