The books are a combination of origin stories (similar to the earlier Secret Origins series produced by DC), profile pages (like DC's Who's Who series from the 1980s), and short stories which sometimes serve as prologues to upcoming DC Comics storylines.
The books combine origin stories (like those in the Secret Origins series produced by DC), character descriptions (as seen in DC's Who's Who series from the 1980s), and short narratives that occasionally serve as precursors to upcoming DC Comics storylines.