Aaberg is the man responsible for the art for the excellent and whimsical Dungeon Degenerates board game. I think 35$ for a 200 page book of his art is a pretty good deal. It’s a bit like Russ Nickolson, Rockin’ Jellybean and Big Daddy Roth had a baby and then forced them to read 80’s White Dwarf magazines and GROO! all day long. Here is the link.
Here’s some of his stuff including my favorite: the cover of the DD expansion, which is just amazing.