Ron Brunckhorst's Alpine Rock and Ice Guide to Montana is the best (and only) reference for those planning to climb one of the numerous rock climbing routes in the Cowen Cirque. Tom Turiano has a great section on the peak in Select Peaks of the Greater Yellowstone.
"No matter how big a guy might be, Nicky would take him on. You beat Nicky with fists, he comes back with a bat. You beat him with a knife, he comes back with a gun. And you beat him with a gun, you better kill him, because he’ll keep coming back and back until one of you is dead."