The origins of comic books date back to the beginning of the 17th century, but it's the newer works that are the most sought-after, in particular those from 1933-1979. The most prized copies of that time are the superhero comics, especially the first issues. It is worth noting that superhero comics are not the only type of comics that has gained value and popularity among collectors. Other genres include manga, science fiction, children, fantasy, action/adventure, alternative/esoteric, horror, humour and romance.