I always enjoy stumbling across easter eggs, cameo appearances, and messages hidden in the artwork of comics. It’s something about the fact that it’s something the artist didn’t have to draw, that they just put in there purely for the fun of it or to let you know something about them. Alex Ross is probably one of the best-known for this, putting the Beatles into Marvels, the Monkees into Kingdom Come, etc. etc. etc., but there are thousands of easter eggs, hidden messages, and unauthorized cameo appearances scattered throughout the pages of comics of all types. Sometimes they’re obvious, sometimes they’re subtle, sometimes you wouldn’t even know they were there unless someone pointed them out to you. Some are just cool little shoutouts, some have gotten people fired. Groo The Wanderer used to have a secret message in every issue, and back when I was a kid I used to spend hours poring over my Groos trying to find them. Some were really easy to spot but I’m sure I never found a lot of them. These days I don’t really have the time to go specifically looking for hidden messages, cameos, and easter eggs, but I try to note them when I spot them, and here I present a bunch that I don’t recall seeing documented elsewhere before. - Aaron