Gershom B originally shared:

Sorry to hear that Herbert Wilf has passed away

http://www.jewishexponent.com/article/25135/Herbert_S_Wilf_80_Mathematics/

http://www.math.upenn.edu/History/obits/Herb_Wilf.html

What I've read of his books has been very instructional, and I expect that I'll be learning more from them for years to come:

http://hans.math.upenn.edu/~wilf/

http://www.jewishexponent.com/article/25135/Herbert_S_Wilf_80_Mathematics/

http://www.math.upenn.edu/History/obits/Herb_Wilf.html

What I've read of his books has been very instructional, and I expect that I'll be learning more from them for years to come:

http://hans.math.upenn.edu/~wilf/