What year was the author of The Art of Thinking born?
Rolf Dobelli Rolf Dobelli (born July 15, 1966 in Luzern, Switzerland) is a Swiss author and businessman.
John Wilmerding John Currie Wilmerding (born 1938), is a well known professor of art, collector, and curator, and is best known as a prolific author of books on American art.