 Kremer created or defined many of the most well known Harvey characters, including Casper the Ghost, Hot Stuff, Joe Palooka, Little Audrey, Little Max, Richie Rich, and Stumbo the Giant.Kremer also excelled at realistic treatments, producing top-quality work for Harvey's romance, war, and horror genre titles.He was the top artist at Harvey, where he worked for 35 years mostly as an art editor.