As the agreement did not cover books that were damaged (or second hand), shops that wished to sell "new" books below cover price for any reason (for example to get rid of obsolete stock or titles that were not otherwise selling) adopted a simple strategy which meant that they were still sticking to the terms of the agreement: they deliberately defaced or damaged the book(s). The two methods most commonly used were to either use a hole punch to punch a hole in the cover of the book or to use a marker pen to mark the edge of the pages. The marker pen method was the most common as it took the least effort.