Complex sentence: In 1940, "Spacehawk" (a different and improved feature) made its debut in "Target Comics" (Novelty Press), running for 30 episodes (262 pages) until 1942.
Split into simpler sentences: In 1940, "Spacehawk" (a different and improved feature) made its debut in "Target Comics", published by Novelty Press. It ran for 30 episodes (262 pages) until 1942.