Meet the men who invented the Ladybird Books for Grown-Ups: 'We're not millionaires, we're …
In a poky, dark office above Holborn tube station sit two of Britain’s best-selling authors. In 2016, only J.K Rowling, David Walliams and Jacqueline Wilson outsold them and yet most people probably don’t know their names. “We have now written 39 books that are all in print and two of them have our …