Marvel Encyclopedia Vol. 1 is broken down into several sections, covering the thematic sections of the Marvel Universe like Spider-Man, Avengers, Fantastic Four, etc. Within each section, the major characters and supporting characters are ordered alphabetically, with their corresponding villains following, also in alphabetical order. Each section carries a brief two-page introduction. Each character with an entry is granted either four, two or one pages that gives a basic history of the character; biographical information such as secret identity, first appearance, height, weight, eye color and hair color; a breakdown on powers and weapons used by the character; and a power ratings grid that measures their intelligence, strength, speed, durability, energy projection and fighting skills. There is also a box that directs readers to essential collections that feature the character's most significant moments. Interspersed with the text material are heavy doses of previously released artwork from today's hottest Marvel artists.