Swamp Thing #90 was published by DC Comics on December 1, 1989, as part of a series that began in 1986. Doug Wheeler writes, and art comes from Alfredo Alcala, John Totleben and Pat Broderick. This 36-page issue features John Constantine, Swamp Thing, Abby Holland, Anton Arcane and Tefé Holland, among 16 characters cataloged on VerseDB.