Ghost Town at Sundown (Magic Tree House #10)Author/s: Mary Pope Osborne

Is this town haunted? Jack and Annie wonder when the Magic Tree House carries them to the Wild West. But before they can say “Boo!” they rush headlong into an adventure filled with horse thieves, a lost colt, rattlesnakes, and a cowboy named Slim. Will Jack and Annie have time to solve the next Tree House riddle? The answer may depend on a ghost!