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!

You tend to find the best in yourself as an artist when you're challenged.

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.

In its brief 14-episode run, 'Firefly' gave viewers as much chance of witnessing a horseback chase or train robbery as a laser gun and spacefight in any given episode. Snappy one-liners and silly hats were a constant, of course.