The Cat Who Played Post Office is the sixth book in Lilian Jackson Braun's The Cat Who series. The novel was published in 1987 by Jove.
Plot Through an inheritance from Aunt Fanny, Jim Qwilleran has acquired a large mansion in the Great Lakes area and, of course, a mystery. Iris Cobb joins him in Pickax as the mansion's caretaker, along with Koko and Yum Yum. Koko keeps trying to tell Qwill something about the missing housemaid, Daisy Mull.
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