Has what it takes: suspense, humor, and intriguing clues. A book that's as much fun as Halloween itself. --School Library Journal While trick-or-treating on Halloween night, Helen and her dog Martha (begrudgingly dressed as a cat) walk into a very unusual supermarket. One for witches and cats only What will happen if the manager realizes the truth about them? This whimsical story by Susan Meddaugh is the first about Martha from PBS's...