Garth Marenghi has announced 18 extra dates in his book tour to promote his latest horror novel, Incarcerat.

Matthew Holness’s alter-ego is publishing the follow-up up to his Sunday Times bestseller, Terrortome, on October 31.

Now promoters Live Nation have unveiled 18 new tour dates in February and March, following the success of an initial 14 gigs, starting in Leeds on the eve of publication.