Although the "mature reader" works of Alan Moore, Grant Morrison (with Jamie Delano and Neil Gaiman) under the DC imprint paved the way for Vertigo's launch, neither author was part of the initial line-up. Indeed, Moore never produced work for the Vertigo imprint — having refused to work for parent company DC in the late 1980s — although his DC-published "Swamp Thing" work and "V for Vendetta" reprint-maxiseries were subsequently collected as Vertigo-issued TPBs, while the "Hellblazer" solo title dealt with the character co-created by Moore, but never written by him.