The Hairy Horror Trick
Scott Corbett, Paul Galdone
Hardcover
(Little, Brown and Company, March 15, 1969)
From the jacketflap:Halloween is ruined. Kerby and Fenton were all warmed up for a good time until Kerby's little cousin Gay did some exploring in the basement and found Kerby's FEATS O' MAGIC CHEMISTRY SET. To persuade her to keep the chemistry set a secret, Kerby and Fenton mix a hurried potion that brings disaster down on Kerby, Fenton, and Waldo the dog.One poof of the magic mist and Waldo is furless, Kerby has a beard and Kenton a mustache. to their horror, the hair on their faces is firmly fixed, and Waldo's baldness is seemingly incurable. There is nothing to do but to go in search of a real witch - Mrs. Graymalkin, of course.
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