`  ===The objectionable textbook material===  ``The ads refer to a controversy in Wheaton schools in the early 1990s surrounding a series of textbooks called ``Impressions,``... They also contained some writings that some parents believed featured themes of the occult, witchcraft, violence and disrespect for parental authority.'  Here is a discussion of one of the offending pieces - a yarn called ``A Wart Snake in a Fig Tree`` which is a kind of a pardody of 'The Twelve Days of Christmas' but with creepy-crawlies and spiders and snakes and stuff. A Wart Snake in a Fig Tree I wonder what Roskam's stance on Harry Potter and Holloween is? -  `