After forming a friendship with comic-book writer Alan Moore, Gaiman started writing comic books, picking up "Miracleman" after Moore finished his run on the series. Gaiman and artist Mark Buckingham collaborated on several issues of the series before its publisher, Eclipse Comics, collapsed, leaving the series unfinished. His first published comic strips were four short "Future Shocks" for "2000 AD" in 1986–87. He wrote three graphic novels with his favourite collaborator and long-time friend Dave McKean: "Violent Cases", "Signal to Noise", and "The Tragical Comedy or Comical Tragedy of Mr. Punch". Impressed with his work, DC Comics hired him in February 1987, and he wrote the limited series "Black Orchid". Karen Berger, who later became head of DC Comics's Vertigo, read "Black Orchid" and offered Gaiman a job: to re-write an old character, The Sandman, but to put his own spin on him.