Since 1961, Perry Rhodan unites Humanity to settle the stars, with cool spaceships that were rendered as cross-section drawings, every 4 weeks in the center of the ~70 page novellas.
I started reading Perry Rhodan when I was less than 14 years old. The center fold "Risszeichnungen" inspired to try myself, and I had my first Illustration published 1978. The series is till being published, currently around #3300 paperbacks forming a continuous storyline.