The Lamb of God frontman released his memoir, Dark Days, last year (15), and now he has set his sights on publishing a new book, this time a fiction story.

"It's set 50 to 100 years in the future," he tells Metal Hammer. "I'm wracking my brain right now, because you have to figure out all sorts of little things we don't think about, because of the incredibly rapid advancement of technology."

Randy plans to develop the plot while on the road with Anthrax when they embark on the trek next week (begs11Jan16), although he doubts he will be able to write much of the story itself.

"Writing a book makes writing a record look like going to kindergarten," the singer explains of the different writing processes. "It's a much more tense, concerted, extended, creative effort - it requires a lot of focus that this (touring) environment does not provide."

He continues of his novel, "I've been thinking about the plot, and at first I thought, 'Oh the ending's just got to be awful.' But then I thought, 'That's self-indulgent.' I've been thinking about how I can make the end of the book optimistic, and it's hard. And I haven't decided how it's going to end, but more than likely there's got to be an optimistic end. Otherwise, I'll just be f**king depressed. And real life is depressing enough."

The rocker's tell-all autobiography filled fans in on the 2012 ordeal he faced in the Czech Republic, where he was imprisoned and put on trial for manslaughter, after he was accused of causing a fan's death by pushing him off stage during a gig in Prague in 2010. He was acquitted of the charge in 2013.