R.I.P. Philip Jose Farmer

Philip José Farmer has died. I saw the news at SFSignal. I've read all the Riverworld books and enjoyed them. I still have my copy of Venus on the Half Shell and remember when I found out who Kilgore Trout was.

Obits:
The Peoria Journal Star:

Science fiction author Philip Jose Farmer died this morning at his home. He was 91.

LocusOnline here and here
io9
SFScope
SFGospel
Frederik Pohl (via SFSignal)
The Independent
SciFiWire: "Anne McCaffrey, Robert Silverberg and others remember"