“I always do book signings with the same blue pen. That way, if I add a personalised message to a book I've already signed, it'll be in the same colour as my signature.”

American writer, lawyer, and former politician

John Grisham is an American writer, lawyer, and former politician, known for his legal thrillers. He has built a long career around courtroom fiction and commercial bestsellers. His books have sold widely around the world, and the American Academy of Achievement says he wrote 37 consecutive number-one fiction bestsellers. He is also among the small group of English-language authors said to have sold two million copies in a first printing, alongside Tom Clancy and J. K. Rowling.