The Cat Who Brought Down the House by Lilian Jackson Braun (2003, Hardcover)

I've been reading Ms. Braun since her first book, and even though some were better than others, you still want to read about Koko, Yum Yum, Qwill and the people of Moose County. It's an on going story....or soap opera, of sorts, that keeps you riveted until the next book.
In this 25th novel, Ms. Braun has Thelma Thackeray, a Hollywood legend, coming home to Pickax,the place she was born. Thelma plans to buy an old opera house and turn it into a film club. But just as she moves back to town, her Amazon parrots are birdnapped. James Qwilleran (Qwill) thinks this may have to do with the recent death of Thelma's twin brother. Koko, the cat of 60 whiskers, is to make his debut in the new Kit Kat Review at the film club, but first he will need to help his master find out who committed the dastardly deeds. He steals the show in the end by not taking his stage sedative and points to the real culprit instead.