Creepy Cowboy Caper is a book in the Capstone series as a part of the Scooby-Doo! Beginner Mysteries line.
Summary[]
Scooby-Doo and the Mystery Inc. gang are lost in the desert and find themselves smack dab in the middle of Sladeville--a ghost town! But the ghosts of Sladeville seem out of place. Something odd is going on in the town, and the gang is going to find out what it is!