Murder Among Friends Hardcover – January 1, 1983 by Frank McConnell 
 
Things haven't been going well for Harry Garnish... Instead of becoming head of the O'Toole Investigative Agency, Harry finds himself with a tough new boss—the surprisingly worldly ex-nun Bridget O'Toole. And then his ex-partner is murdered, and Harry's investigation uncovers dangerous information about the relationships among a powerful local millionaire, a Skokie saloonkeeper, and some pretty heavy players in Chicago's notorious underground. But perhaps worst of all, as Harry dodges bullets and survives several kidnappings, the ever-capable Bridget remains calmly in control and one step ahead of him all the way.
 
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