The Fandex Family field guides cover a diverse range of subjects, including US presidents, famous composers, flora and fauna, and characters of mythology. They’re so named because they are indexes with pictures (like a field guide) that fan out. The decks are permanently bolted together at the base, with the tops of the cards individually die-cut, providing a visual of each specimen. The body of each card functions as a complete chapter of the guide, containing information about its particular subject. A field guide on DC Comics’ Super Heroes and Villains includes entries on the Legion and Starman.