When Artie Lange joined the permanent cast of The Howard Stern Show in 2001, it was possibly the greatest thing ever to happen in the Stern universe, second only to the show’s move to the wild, uncensored frontier of satellite radio. Lange provided what Stern had yet to find all in the same place: a wit quick enough to keep pace with his own, a pathetic self-image to dwarf his own, a personal history both heartbreaking and hilarious,...