In one of the boxes I glimpsed a paperback book, which seemed at first glance to be entitled "Gross Jokes". Naturally I was surprised and pleased that Greg should own such a book. However, on closer inspection, it transpired that the title of the book was "Awesomely Gross Jokes, volume VI". I'm secretly glad that a market exists for a series such as this.
"Awesomely Gross Jokes, volume VI", Zebra books of NY, 1988, ISBN 0-8217-3613-2