Donald Patrick Redheffer is a graduate of DePaul University. Although he is a retired teacher of mathematics, his first loves are philosophy and poetry. The author of three previou...mehr sehenDonald Patrick Redheffer is a graduate of DePaul University. Although he is a retired teacher of mathematics, his first loves are philosophy and poetry. The author of three previous books, he is also an accomplished nature photographer. He is a native of Chicago, where he now resides with Joselita Velasco.weniger sehen