Man-Thing Reading Order, Marvel’s Swamp Monster
When the Comics Code Authority went into action in the 1950s, the horror genre was the most affected by it. But in 1971, the code was finally revised and the creatures of the night finally got some leeway. A lot of restrictions were still in place, but the undead monsters starting to make a comeback. Before Werewolves and Vampires became prominent again, muck monsters got their chance to scare the readers.
Launched by DC Comics in House of Secrets #92, Swamp Thing created by Len Wein and Berni Wrightson was thought of as a one-off character. In another one-shot simply titled The Heap #1, Skywald Publishing revived The Heap, a swamp monster from the 1950s (another version of the character also appeared in Skywald’s magazine Psycho). And Marvel had of course the Man-Thing.
The timing was strange, but those characters were different enough from one another to avoid any conflict (even if Marvel thought about suing DC for a time). Also, muck monsters were not a new thing in the comics world.