Ghost Town at Sundown
Mary Pope Osborne
Published: 2001
Pages: 79
In this title, the 10th in the series, the Tree House house whisks Jack and Annie back to a ghost town in the Wild West of the 1880s. There are wild horses, wandering ghosts and rattlesnakes. Ann tames a lost colt and they meet a friendly stranger, but will he help them solve the second riddle?