Set of 8 Mary Engelbreit Halloween Cards 4 Designs wOrange Envelopes. Brand New Mary Engelbreit Halloween. 7. 85. Top Rated Plus. Sellers with highest buyer ratings; Queen of Halloween by Mary Engelbreit Children's Book Illustrated Trick or Treat. 5 product ratings [object Object 4. 75. or Best Offer all materials appearing on this website may not be reproduced or stored in a retrieval system without prior written permission of the publisher and in no case for profit. Always entertaining, sometimes quirky, artist Mary Engelbreit has added a smidgen of eeriness to these fanciful Halloween cards.