Jack MacLeod's first two novels established him as that rarest of talents, a writer who can entertain while also grappling with ideas and social issues. "Uproar, " his new novel, is the story of a marriage in free fall, a career on the skids and the bewildering era we have only just recently survived. Included among the list of zany characters is Zinger' -- that remarkable literary creation who first made an appearance in "Zinger and Me" (1979), and whom the actor Don Harron has called one of the most memorable characters in Canadian literature'.