By his own reckoning, Garrison Keillor was the host, head writer and ringmaster for approximately 1,500 episodes of A Prairie Home Companion, the folksy, satirical program that began airing over National Public Radio in 1974 (Keillor, who created the program, retired in 2016). The Minnesota humorist and top-shelf storyteller is 84 years old, and he still writes at a feverish pace (more than 30…
