''Fluid Concepts and Creative Analogies: Computer Models of the Fundamental Mechanisms of Thought''

http://images.amazon.com/images/P/0465024750.01.LZZZZZZZ.gif [ISBN 0465024750] 

by DouglasHofstadter and the FluidAnalogiesResearchGroup, Basic Books, 

Among other things Hofstadter describes the LetterSpirit project which attempts to teach creative letter design to computers.

JonUdell's review: 
*** http://www.byte.com/art/9503/sec6/art2.htm
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This takes some of his AI ideas from (eg) GoedelEscherBach and tries to turn them into real code. The book provides higher level descriptions than the code itself, but its still refreshingly practical.

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