Swamp Thing is a character who blurs the lines of regular man who looks like a monster, a straight up piece of vegetation that looks sort of like a man, and both of things but also an eco-terrorist of sorts, but no matter how you view the character, it’s impossible to deny the fact that some of the greatest writers in comics have either written him or his ancillary characters. Also, when he’s not questioning his identity, he’s a pretty eco-friendly dude. So, it’s with this fact that Comixology is offering a 99 cent three-day sale on Swamp Thing for this weekend’s Earth Day.

Comixology has recently made these sales more manageable if you don’t exactly know what you’re looking for and have places different comics into sections that categorize them more efficiently than just, “Here’s a bunch of comics that are on sale.” These different sections for Swamp Thing are:

The Roots of Swamp Thing (House of Secrets #2, Swamp Thing #1-24): Featuring the first appearance of Swamp Thing in House of Secrets as a horror comic character, moving into the 1970s series which also featured him more along the lines of a revenge seeking horror character as opposed to building the world of the character and socially conscience hero of the environment.

The Saga of The Swamp Thing Begins (The Saga of The Swamp Thing #1-19): Swamp Thing is reborn as a hero and his origins are rebooted. This is the prelude to one of the greatest comics runs of all time.

Alan Moore and The Swamp Thing (The Saga of The Swamp Thing/Swamp Thing #20-64): This is THE run that everyone talks about. Comic book icon Alan Moore shows up on the series to create one of the most epic and beautifully poetic comics of all time. If you haven’t read this run yet, now’s the time.

Tales from The Green (Swamp Thing #65-77): The follow up run to Alan Moore’s run, where our hero renounces his part as the plant elemental, as a result he runs into a lot of problems.

Each one of these comics is a mere 99 cents, so you can get the whole thing for about $100, but if you just wanted some classic horror, you could spend only $24 (issue one is free), or if you just wanted to get the Alan Moore run, you could get that for only $45. I understand if you just want to grab the Alan Moore run. And like, digital comics are totally green, so go here and buy this stuff, you know? No matter what your choices in this sale are, you should at least participate because if you’re not going to get these comics for yourself, do it for the environment, man.

The Comixology 3-Day Swamp Thing Earth Day Sale starts today, April 21, and lasts until Monday, April 23.