A publisher found that when it put the first chapter of a novel on its website free of charge, sales of that novel rose. It now plans to do the same with its cookery titles. An editor warns that the plan may not work for cookery titles, because ______. Which of the following most logically completes the editor's objection?

The free chapter works for a novel because it leaves the reader wanting the rest, so the sample creates the sale. A cookery title is read in pieces, and a reader who already has the recipes he wanted has no reason to buy the book, so the same sample can replace the sale instead of creating it. Paper weight, falling website traffic and library borrowing apply as much to novels as to cookery titles and so do not explain a difference between the two.