# Is "Interworld (with Michael Reaves)" by Neil Gaiman a First Edition?

> **Quick answer.** A first edition of Interworld (with Michael Reaves) by Neil Gaiman (Eos / HarperCollins, 2007) is identified by: US Eos (HarperCollins) hardcover 2007; copyright page states First Edition with a complete number line including 1. US Eos hardcover is the true first; a stated First Edition alone is not sufficient -- the number line must reach 1.

**Checklist — a true first has these:**
- US Eos (HarperCollins) hardcover 2007; copyright page states First Edition with a complete number line including 1
- Caution: some copies state First Edition but carry a number line starting at 2 -- those are later printings
- Black boards with gilt spine lettering, black endpapers
- Publisher imprint reads Eos / HarperCollins
- Not a book-club edition (see below)

| | |
|---|---|
| Author | Neil Gaiman |
| Publisher | Eos / HarperCollins |
| Year | 2007 |
| True first | US edition |
| Format | Hardcover (trade) |
| Key point | US Eos (HarperCollins) hardcover 2007; copyright page states First Edition with a complete number line including 1 |
| Book-club edition exists? | — |

## Points of issue
YA science fiction. US Eos (HarperCollins) hardcover 2007; copyright page states First Edition with a complete number line including 1. Caution: some copies state First Edition but carry a number line starting at 2 -- those are later printings. Black boards with gilt spine lettering, black endpapers.

## Is this the true first?
US Eos hardcover is the true first; a stated First Edition alone is not sufficient -- the number line must reach 1.

## Telling it from reprints & book-club editions
Later printings retain the First Edition statement but the number line lacks a 1.

## Source
New Mexico Literacy Project — Is *Interworld (with Michael Reaves)* by Neil Gaiman a first edition? https://newmexicoliteracyproject.org/first-edition/interworld-with-michael-reaves
CC BY 4.0. Part of the Canonical First-Edition Points of Issue dataset (https://newmexicoliteracyproject.org/api/first-edition-titles.json). Last reviewed 2026-07-04.