A wizard wants a guard dog to keep the peddlers away from his door, disturbing him as he goes about his important wizarding business. To ensure that the dog will be clean and not require any food, he commissions a dog made of glass. THE GLASS DOG is the second tale in L. Frank Baum's 1901 short story collection 'American Fairy Tales,' originally published by the same publishing company as 'The Wizard of Oz.'