There are 7 books in the Holmes on the Range Mysteries series. The newest book is Hunters of the Dead which came out in 2023.

Somewhere due west of Deadwood, a pair of unlikely cowboy sleuths investigate murder just like their hero, Sherlock Holmes. 1893 is a tough year in Montana, and any job is a good job. When Big Red and Old Red Amlingmeyer sign on as ranch hands at the secretive Bar- VR…
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2
On the Wrong Track

Book cover of On the Wrong Track
Gustav "Old Red" Amlingmeyer is an old-fashioned kind of guy: he prefers a long trail even when a train ticket can get him where he's going in one-tenth the time. His brother Big Red, on the other hand, wouldn't mind climbing down from his horse and onto a train once…
Gustav "Old Red" Amlingmeyer and his brother, Ctto (a.k.a. "Big Red"), cowpokes by training, discovered Sherlock Holmes through the stories and are now devotees of his method of detectifying". The two brothers are in San Francisco in 1893 with an eye towards a real detective job. But that's not working…

4
The Crack in the Lens

Book cover of The Crack in the Lens
In 1893, Otto 'Big Red' Amlingmeyer and his brother Gustav, 'Old Red' find themselves in a situation that they never expected. They have a bit of money and time to do something other than scramble. It's enough to confound even that most unconfoundable of men, their mutual inspiration, Sherlock Holmes.…

5
World's Greatest Sleuth!

Book cover of World's Greatest Sleuth!
In 1893, the Amlingmeyer boys venture forth from the west in response to a summons from Otto's ("Big Red") publisher - they are to come to Chicago immediately, to the World's Columbian Exposition, and compete with some of the most famous detectives in the world. Set to coincide with the…

6
The Double-A Western Detective Agency

Book cover of The Double-A Western Detective Agency
Big Red and Old Red Amlingmeyer’s dream has come true: The Sherlock Holmes-worshiping cowboy brothers are finally in business as professional detectives. But their fledgling A.A. Western Detective Agency faces a few challenges. Their partner, Col. Crowe, is almost as cantankerous and secretive as Old Red himself. The colonel’s daughter,…

7
Hunters of the Dead

Book cover of Hunters of the Dead

SHERLOCK HOLMES MEETS THE OLD WEST IN THIS FAST-PACED MURDER MYSTERY THAT UNEARTHS MORE THAN JUST FOSSILS.

The A.A. Western Detective Agency takes on a new case in 1894 Wyoming, a land of bandit gangs and rustlers, when a group of scientists come to town in the hopes of rustling…