What were 2002’s hottest UK paperback sellers? John Grisham leads the list, as expected. And there were an awful lot of manufactured celebrity books. Some 30 million paperbacks were sold in the UK in 2002, about the same as in 2001, but nearly three million down on 2001 (there was a new Harry Potter that year). Still, it’s estimated that fewer than 50 percent of Britons ever buy a book. Here’s the list of paperbacks most sold…