Neil Gaiman is, in the words of Forbes magazine, “the most famous author you’ve never heard of”. His 25-year career has always been of a decidedly strange hue, taking in comics, graphic novels and children’s fiction — many of them produced in collaboration with the graphic artist Dave McKean — plus fantasy fiction for adults and screenplays (MirrorMask, which has just been released, and Robert Zemeckis’s long-awaited Beowulf). There is even an unauthorised biography of Duran Duran with Gaiman’s name on it. Supplying the source material for the new National Theatre of Scotland is only the latest feint from a writer more or less impossible to pin down.More from Jasper Rees in The Times. The National Theatre of Scotland's production of Wolves In The Wall, based on th book by Neil Gaiman and Dave McKean, opens on Saturday at the Tramway theatre in Glasgow.