Adults and Children's Books

The Telegraph has an opinion piece on the "phenomenon" of adults reading books aimed at young readers:
Until recently adults were assumed and even expected by publishers and bookshops to stick to their side of the fence. But in the past five years, as the full impact of the Rowling revolution has made itself felt, the literary landscape has changed. Adults, all of a sudden, are devouring children's books. Some of the best writers are confining themselves to the children's and young adults' sector. Meanwhile, books written for young adults have never been more grown-up. The result is that the line between children's fiction and adult fiction has blurred.