His period of greatest fame and influence in the medium was in the late 1960s and 1970s with the characters Deadman, Green Arrow, Green Lantern and Batman. His best known collaborator is writer Dennis O'Neil who created noteworthy stories that restablished Batman's dark brooding nature and experimented with social commentary in the Green Lantern title.
Adams later started his own company, Continuity Press, which featured artwork by various artists who predominately imitated their boss's illustration style.