Jay Kristoff

There's a fairy story called the 'The Shoemaker and the Elves' where this old cobbler keeps leaving leather out overnight and wakes up the next day, and there's a new pair of shoes. Co-authoring is a little like that. You send off the manuscript to your partner, and a few days later, you check your email, and hey, there's more book in here!

There are plenty of genre-crossover books, films, and games out there, but to do the job well, you have to do more than just smoosh a couple of 'in' concepts together, and hey presto, instant millions.

As England manager I always felt we needed an extra man in midfield to retain the ball, but that was more as an attacking ploy to help create opportunities. It came from my experience playing international football in a 4-4-2 and spending half my time chasing the ball.