Harry Potter

 

New research from Booklist shows page counts have grown 173% over 40 years, and suggests that JK Rowling’s boy hero may be responsible for large increase in early 2000s.

 

Read more here.

Source: http://www.theguardian.com/books/2016/mar/03/harry-potter-trend-for-much-longer-childrens-books-booklist-jk-rowling