# Is "The Ganymede Takeover" by Philip K. Dick a First Edition?

> **Quick answer.** A first edition of The Ganymede Takeover by Philip K. Dick (Ace, 1967) is identified by: Ace Books paperback original, catalog number G-637, written with co-author Ray Nelson, with cover art by Jack Gaughan; the wraps carry the G-637 catalog number and the original printed cover price, and the text runs to 157 pages. The US Ace paperback original (G-637) is the true first edition; there was no prior or simultaneous hardcover, so this softcover is the first appearance in book form.

**Checklist — a true first has these:**
- Ace Books paperback original, catalog number G-637, written with co-author Ray Nelson, with cover art by Jack Gaughan; the wraps carry the G-637 catalog number and the original printed cover price, and the text runs to 157 pages
- As a mid-1960s Ace paperback original there is no printer's number line; the G-637 catalog designation on the front cover and spine, together with the intact printed cover price, is the identifying point
- One of only two novels Dick co-authored
- Publisher imprint reads Ace
- Not a book-club edition (see below)

| | |
|---|---|
| Author | Philip K. Dick |
| Publisher | Ace |
| Year | 1967 |
| True first | US edition |
| Format | Hardcover (trade) |
| Key point | Ace Books paperback original, catalog number G-637, written with co-author Ray Nelson, with cover art by Jack Gaughan; the wraps carry the… |
| Book-club edition exists? | No |

## Points of issue
Ace Books paperback original, catalog number G-637, written with co-author Ray Nelson, with cover art by Jack Gaughan; the wraps carry the G-637 catalog number and the original printed cover price, and the text runs to 157 pages. As a mid-1960s Ace paperback original there is no printer's number line; the G-637 catalog designation on the front cover and spine, together with the intact printed cover price, is the identifying point. One of only two novels Dick co-authored.

## Is this the true first?
The US Ace paperback original (G-637) is the true first edition; there was no prior or simultaneous hardcover, so this softcover is the first appearance in book form.

## Telling it from reprints & book-club editions
No book club edition and no hardcover edition of this period. Issued only as an Ace paperback original, identified by the G-637 catalog number.

## Source
New Mexico Literacy Project — Is *The Ganymede Takeover* by Philip K. Dick a first edition? https://newmexicoliteracyproject.org/first-edition/the-ganymede-takeover
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.