The Cat Who Moved a Mountain — Lilian Jackson Braun

Qwill's on top of the world when he rents a house on Big Potato Mountain. The owner, J.J. Hawkinfield, brought real estate development to the once-peaceful Potatoes. But Hawkinfield paid a steep price for his enterprise: He was pushed off a cliff by an angry mountain dweller Qwilleran, however, suspects the man is innocent--and Koko's antics have him convinced something's wrong. He may be making a mountain out of a molehill ... but he's determined to find the truth. Even if it means jumping out of the frying pan and into the fire!

Qwilleran--a prize-winning reporter with a nose for crime. Koko--a Siamese cat with extraordinary talents and a flair for mystery Yum Yum--a lovable Siamese adored by her two male companions. The most unlikely, most unusual, most delightful team in detective fiction!