Ghost is the fictional superhero of an eponymous comic book published by American company Dark Horse Comics. The character appeared in specials and monthly titles detailing the afterlife of Elisa Cameron and her search for the truth surrounding her (apparent) death. Ghost first appeared in Comics' Greatest World, week three, in 1993. After a popular special in 1994, a monthly title devoted to the character began publication in 1995. It ran for 36 issues, followed by a six-month break and a second series of 22 issues. The second series was a continuation of the first with a number of changes, including new details about Ghost's origin. The stories in both series were based in (and around) the city of Arcadia, in a self-contained fictional universe outlined in Dark Horse's Comics' Greatest World. Ghost continued appearing in her own titles (and others) into the 2000s, including several crossovers unrelated to Comics' Greatest World. Most notable among these were a two-issue crossover with Dark Horse's Hellboy (Ghost/Hellboy), and a four-issue crossover with DC Comics' Batgirl (Ghost/Batgirl: The Resurrection Machine). Source: Wikipedia (en)