Jim Qwilleran is a prizewinning reporter who's been on the skids but is now coming back with a job as feature writer (mostly on the art scene) for the Daily Fluxion. George Bonifield Mountclemens, the paper's credentialed art critic, writes almost invariably scathing, hurtful reviews of local shows; delivers his pieces by messenger; lives with his all-knowing cat Koko in a lushly furnished house in a moldering neighborhood, and has a raft of enemies...

The team of Koko, the brilliant Siamese cat, and Qwilleran, the reporter with the perceptive moustache, is back in action -- with an adorable female Siamese, Yum Yum, added to the household.When Qwilleran decides to do a feature series on Junktown, he gets more than he bargained for. Not the dope den he anticipated, Junktown is a haven for antique dealers and collectors -- as strange a lot as the crafty reporter has ever encountered. When a mysterious...

Is it just a case of summertime blues or a full-blown career crisis? Newspaper reporter Jim Qwilleran isn't sure, but he's hoping a few days in the country will help him sort out his life. With cats Koko and Yum Yum for company, Qwilleran heads for a cabin owned by a long-time family friend, "Aunt Fanny." But from the moment he arrives, things turn strange. Eerie footsteps cross the roof at midnight. Local townsfolk become oddly secretive. And then...

When a suspicious accident claims the life of the local paper's eccentric publisher, reporter Qwilleran and his talented cats Koko and Yum Yum set out to discover what really happened.

Millionaire newsman Jim Qwilleran and his two Siamese cats solve a series of murders of handymen in the resort town of Mooseville.

The colorful Casablanca apartment building is in danger of demolition--but not if Jim Qwilleran can help it. He's determined to restore the building to its original grandeur. So he moves in with Koko and Yum Yum--and discovers that the Casablanca is steeped in history...and mystery. In Qwill's very apartment, a glamorous art dealer met an untimely fate, and the veteran journalist and his crime-solving cats are about to reach new heights in detection...

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...

Qwill’s moved into the old Gage mansion—and the cats are on a treasure hunt. The house’s fifty closets are crammed with several generations of junk, and while Qwill investigates two recent deaths—those of the mansion’s former occupant and a local potato farmer—Koko investigates the contents of the closets. Qwill and the cats wind up unearthing some surprising skeletons—and bringing long-buried secrets to light...

The affluent owner of a historic steam locomotive and private railcar disappears with millions of dollars belonging to Moose county investors. Journalist-detective Jim Quill probes the embezzlement with the aid of his Siamese sleuths, Koko and Yum Yum. The case is complicated by a train wreck and a murder in a railroad tavern. By the author of The Cat Who Could Read Backwards, the book which launched the 17-volume series in 1966.

In this latest installment, prizewinning reporter Jim Qwilleran—along with his lovable Siamese cats Koko and Yum Yum—solve a mystery that arises when a local banker dies under suspicious circumstances, leaving behind a flashy young widow, an unfinished house-restoration project, and a trail of clues as elusive as a cat burglar in the night.

UFOs in Mooseville? Rumors abound that a missing backpacker has been abducted, and it looks like Jim Qwilleran's sedate summer may be interrupted by an investigation -- with the help of his own little aliens, Koko and Yum Yum. And when the backpacker's body turns up -- and transplanted Floridian Owen Bowen is found dead soon afterward -- the search for intelligent life turns into a close encounter with a killer.

The way Jim Qwilleran sees it, there’s nothing worse than being left high and dry. But that’s exactly where he’s been ever since a record-breaking drought hit Moose County. He’s bedraggled. Beleaguered. And, following a rash of fires at local historic mine sites, deeply bewildered. Some blame the blazes on bad weather conditions, but Qwill’s thinking arson. And when a mysterious explosion is followed by a blood-chilling murder, he starts...

Retiring in Pickax, actress Thelma Thackeray has decided to start a film club and organize a fundraiser revue, starring Koko the cat. But Thelma's celebrated arrival takes an unpleasant turn when the strange circumstances of her twin brother's recent death seem suspicious to Jim Qwilleran. Qwill needs a helping paw in this case. But will Koko deign to take time from his stage debut?

The merry atmosphere in Pickax is dampened by the death of an out-of-town actor and the theft of a rare book. Qwill finds himself distracted from the events by his finicky pal Koko, who's been acting more fishy than feline. Has Koko gone bananas, or is he trying to let the cat out of the bag to solve the dual mysteries?

Moose County is in an uproar following vast inheritances from wealthy old families. Only 'Cool Koko' knows what's happening and he's not telling. Jim Qwilleran thinks it's because he has more whiskers than ordinary cats, but who's counting? Meanwhile, Koko meets a piano tuner, Polly goes to Paris, Qwill writes a play, and there's a mysterious death from a bee sting.