'A writing class may help': Harry Potter author JK Rowling shares rejection letters from publishers who had no idea she was writing under the pen name Robert Galbraith

'A writing class may help': Harry Potter author JK Rowling shares rejection letters from publishers who had no idea she was writing under the pen name Robert Galbraith

Rowling (right) was pitching her first novel, The Cuckoo's Calling, when she got letters from British publishers Constable and Robinson (left) and Creme de la Creme. The book, a post-war detective novel, went on to be a number one bestseller, and in order to inspire other writers the Harry Potter author has posted the letters on Twitter.