One Terrible Halloween (Sam: Dog Detective)

Sam: Dog Detective is bored. There are no ghosts in her house, no monsters, no mysteries! Luckily, Halloween is only a week away; soon Woodford will be crawling with vampires, goblins, mutants and witches. And the sheepdog sleuth's excitement grows when she and her friends, Jennie and Beth, uncover a spooky legend. Once every hundred years on Halloween night, real live ghouls slink out of the woods searching for children to steal away! When Sam sees hooded, white-faced creatures piling out of a creepy black van, she knows the ghouls have arrived -- but will she be able to put a stop to their horrible Halloween plot?