The Irish author Eoin Colfer has revealed he has been writing a stage musical since finishing his Hitchhikers Guide to the Galaxy sequel.
"I'm taking time off now to do a musical with two guys," Colfer said.
He said he hoped to take the production, Lords of Love, to the Edinburgh Fringe next year.
"That's what I'm really excited about at the moment. I finished Hitchhiker in January, so I've kind of moved on from that," he told the BBC.
Colfer - best known as the author of the Artemis Fowl children's novels - launched And Another Thing..., the sixth novel in Douglas Adams's cult Hitchhiker's Guide series, this week.
He said that Lords of Love was actually his second musical project.
"The first musical we wrote was about an Irish legend and there were about 500 people in it and we blew up a city in the middle and there were magic dragons. Everyone liked the music but they said it would cost 14m to put it on!
"So the next is a swing musical - just two guys in a bar."
He said the plot was about a double act trying to make a comeback.
"It's a bit like if you can imagine Frank Sinatra and Jerry Lewis never really made it, and now they're 50 and 55 and they are trying to do a reunion tour."
The author added: "It's quite funny, but it's bittersweet, very sad too.
"This is the brief that I gave to the song writers," Colfer laughed. "I said okay guys, all we have to do is write 20 songs that are as good as My Way, and then I write loads of fart jokes.
"It's not going to make any money - if it even gets out of Wexford we'll be lucky."