Simon recalled in 1988, "I loved Jack's work and the first time I saw it I couldn't believe what I was seeing.
He asked if we could do some freelance work together.
The pair hired writers, inkers, letterers, and colorists in order to create a year's worth of material.
The pair then revamped the Sandman feature in Adventure Comics and created the superhero Manhunter. The ongoing "kid gang" series of the same name, launched later that same year, was the creative team's first National feature to graduate into its own title.
With World War II underway, Liebowitz expected that Simon and Kirby would be drafted, so he asked the artists to create an inventory of material to be published in their absence.
Through that company, Kirby did what he remembers as his first comic book work, for Wild Boy Magazine.
This included such strips as the science fiction adventure "The Diary of Dr.
He began to explore superhero narrative with the comic strip The Blue Beetle, published from January to March 1940, starring a character created by the pseudonymous Charles Nicholas, a house name that Kirby retained for the three-month-long strip.