Collectors value first appearances for their rarity and historical value, while many regular readers are interested in viewing how their favorite characters were originally portrayed.
book | American comic book | Domesday Book | National Book Award | comic | Book of Genesis | Book of Exodus | Book of Common Prayer | children's book | Book of Revelation | The Jungle Book | Golden Book of Cycling | Last Comic Standing | San Diego Comic-Con International | Book of Isaiah | The New York Times Book Review | Comic Relief | picture book | Yellow Book | Book of Ezekiel | Doomsday Book | Book series | The Yellow Book | Book of Job | The Comic Strip | Project Blue Book | Book frontispiece | National Book Critics Circle Award | Limca Book of Records | Golden Age of Comic Books |
Published during the comic book speculator boom, the involvement of Jim Lee and Rob Liefeld caused the issues of the crossover to sell for $10–20 on the secondary market when the books were first published, though the issues have since gone down in value.