A growing campaign against assigning appropriate age bands to children's books has recruited JK Rowling as its newest member, joining other well-known children's writers such as Anthony Horowitz, Terry Pratchett, and Alan Garner. The petition believes that imposing an age-banding on children's books is “ill-conceived, damaging to the interests of young readers and highly unlikely to make the slightest difference to sales.” The campaign formed in response to an initiative commissioned by the Children's Book Group of the Publishers' Association, which two years ago released a study that suggested that 86% of consumers were in favor of age-guidance. In direct response, Random House, Penguin, and Scholastic all eagerly jumped on board, announcing their plan to unveil book covers this fall with age-appropriate imprints indicating levels such as 5+, 7+, 9+, and 13+/teen.