About Saga of the Swamp Thing
This series is famous for being the first American comic book written by Alan Moore, who took over the series with #20.
The series was also the first mainstream comic series to print without approval by the Comics Code Authority since the Code's inception. The content of #29 was rejected by CCA based on the suggestion of incest, but the publisher decided that they did not have enough time to rework the story and just removed the CCA stamp from the issue. CCA approval was renewed with #30, but starting with #31 the publisher decided to drop CCA completely from this title and provide the first mainstream comic written exclusively for adults.