During this same period, the comic audience has begun to grow up and the direct market for comic stores had opened allowing a wider variety of publications to be experimented with. One such experiment involved bringing in British writer Alan Moore to pen the low selling "Saga of the Swamp Thing" series. What resulted was style of comic book not experienced before by mainstream readers in its literary and story driven complexity and execution. Before long, other writers from across the pond such as Neil Gaiman, Peter Milligan and Grant Morrison were recruited to revamp obscure properties and tell new and interesting stories with an older audience in mind. 1986 saw the release of two seminal works from DC Comics, Frank Miller's "The Dark Knight Returns" and Alan Moore's "Watchmen" that reached unprecedented levels of critical acclaim and outside media attention. By the 90's DC and the entire comic book industry experienced a boom in mature comics aimed at older audiences and simultaneously witnessed a collector's boom that increased sales but almost caused the industry to collapse soon after.