I'm about three-quarters of the way through Crumb: A Cartoonist's Life by Dan Nadel. It's really good, highly recommended.
Reading it doesn't make me feel like I missed out on "the sixties" so much, but it does make it seem like it was a great time to be involved in comics fandom. As kids Crumb and his brother collect Carl Barks and Walt Kelly comics obsessively and contribute to comics fanzines. Terry Zwigoff teaches classes on Barks comics before managing a comic shop, which he then quits to join a bluegrass band with Crumb and Robert Armstrong, creator of Mickey Rat. The other Zap guys are all Barks-heads too; as idiosyncratic and unique as they are, the influence of the Good Duck Artist is clear as day.
Neat to think that the hip, cutting-edge transgressive artistes of yore were all big Donald Duck and Little Lulu fans.