Creativity for Graphic Designers by Mark Oldach, North Light Books 1995
Thinking Creatively: New Ways to Unlock your Visual Imagination by Robin Landa, North Light Books 1998

The Design Concept, by Allen Hurlburt.

Design Elements: A Graphic Style Manual by Timothy Samara, Rockport Publishers 2007. ISBN: 978-1-59253-261-2

New Typographic Design by Roger Fawcett-Tang, published in North America by Yale University Press. ISBN: 978-0-300-11775-2

Curt Akin

Thank you all for your comments.
I have noted them down. I will be heading for Miami and will have a look there since books are much cheaper then they are here.