John Barrowman and his sister, Carole, dropped into chat to Graham Norton on his BBC Radio 2 show earlier today.

While the majority of the interview was focused on their new children’s book, Hollow Earth, which is out now, they also teased fans of Captain Jack with a few details about their forthcoming Torchwood novel! “We have just mapped out and finished the very first chapter of it,” John revealed, before exclusively revealing its title as Exodus Code. He confirmed: “It comes out in August or September.”

In another interview recently, the actor said the story is “f****** awesome” for fans.

Meanwhile, they’ve also appeared on BBC Radio Oxford to promote the book, which tells the story of telepathic twins who find themselves sought out by villains. During that interview, John comments on the future of Torchwood, simply saying: “Wait and see…”.