Margaret Mizushima

Deputy Mattie Cobb is in a dark place and has withdrawn from Cole Walker and his family to work on issues from her past. When she and her K-9 partner, Robo, get called to track a missing junior high student, they find the girl dead on Smoker's Hill behind the high school, and Mattie must head to...

When a young girl is found dead in the mountains outside Timber Creek, lifelong resident Officer Mattie Cobb and her partner, K-9 police dog Robo, are assigned to the case that has rocked the small Colorado town. With the help of Cole Walker, a local veterinarian and single father, Mattie and...

A deluge has flooded the high ground near Hanging Falls - but heavy rains aren't the only menace descending on Timber Creek. While on a scouting mission to pinpoint trail damage, officer Mattie Cobb and her K-9 partner, Robo, stumble upon a body floating at the edge of a lake. Robo catches human...

Secrets hide within the fog deep in the mossy forests of the Pacific Northwest, in this ninth thrilling installment in award-winning author Margaret Mizushimas Timber Creek K-9 Mystery series. Deputy Mattie Wray, formerly Mattie Cobb, is summoned to Washingtons Olympic peninsula for an urgent...

Deputy Mattie Cobb and her sister, Julia, travel to Mexico to visit their mother, but when they arrive, they discover that she and her husband have vanished without a trace. Back in Timber Creek, Mattie finds a chilling note on her front door telling her to look for “him” among the standing...

The next thrilling installment in the Timber Creek K-9 mysteries. When Deputy Ken Brody's sweetheart goes missing in the mountains outside Timber Creek, Mattie Cobb and her K-9 partner Robo are called to search. But it's mid-October and a dark snow storm is brewing over the high country. And...

On a rugged Colorado mountain ridge, Mattie Cobb and her police-dog partner, Robo, make a grisly discovery - and become the targets of a ruthless killer. Colorado's Redstone Ridge is a place of extraordinary beauty, but this rugged mountain wilderness harbors a horrifying secret. When a charred...

He was suspect number one - the man who tried to kill Deputy Mattie Cobb and may have killed her father 30 years earlier. But when Mattie and cold-case Detective Jim Hauck reach the Colorado state prison where they will finally get to interview him, he's found dead in his cell. There's only one...

Two brutal murders, a menacing band of poachers, and a fearsome creature on the loose in the mountains plunge Mattie Cobb and her K-9 partner Robo into a sinister vortex. An explosion outside a community dance sends Mattie Cobb and Cole Walker reeling into the night, where they discover a...

A killer lurks in Colorado’s snowy high country in Dying Cry, the tenth thrilling installment of award-winning author Margaret Mizushima’s Timber Creek K-9 mystery series. Newlyweds Mattie and Cole Walker are teaching Cole’s daughters how to snowshoe in a remote canyon when a shattering...