Besides "Maakies", Millionaire has produced a series of comics and picture books, collectively titled "Sock Monkey". He has also occasionally contributed to comics anthologies including "Legal Action Comics", "Star Wars Tales", Marvel's "Strange Tales", "Dirty Stories", and "Bizarro Comics". His illustrations are published in many leading venues including "The New York Times", "The New Yorker" and "The Wall Street Journal". Currently, he does much of the artwork, along with Charles Burns, for Dave Eggers' magazine "The Believer". Animated versions of his work have been featured on "Saturday Night Live", in the They Might Be Giants documentary "Gigantic", and on "Adult Swim". In 2006, Fantagraphics Books published his graphic novel "Billy Hazelnuts". He is working on a children's book to be published by Hyperion. Since February 10, 2010, Millionaire's comic "Maakies" has been published weekly in "Nib-Lit".