Justice League America #27 was published by DC Comics on June 1, 1989, as part of a series that began in 1989. Keith Giffen and Kevin Dooley write, and art comes from Dick Giordano, Gene D'Angelo and Joe Rubinstein. This 36-page issue features Batman, Martian Manhunter, Guy Gardner, Booster Gold and Amanda Waller, among 18 characters cataloged on VerseDB.