# Is "Locked On" by Tom Clancy a First Edition?

> **Quick answer.** A first edition of Locked On by Tom Clancy (G.P. Putnam's Sons, 2011) is identified by: 'First Edition' stated on the copyright page with a complete number line ending in 1. US Putnam hardcover is the true first.

**Checklist — a true first has these:**
- 'First Edition' stated on the copyright page with a complete number line ending in 1
- Co-authored with Mark Greaney
- Publisher imprint reads G.P. Putnam's Sons
- Not a book-club edition (see below)

| | |
|---|---|
| Author | Tom Clancy |
| Publisher | G.P. Putnam's Sons |
| Year | 2011 |
| True first | US edition |
| Format | Hardcover (trade) |
| Key point | 'First Edition' stated on the copyright page with a complete number line ending in 1 |
| Book-club edition exists? | — |

## Points of issue
'First Edition' stated on the copyright page with a complete number line ending in 1. Co-authored with Mark Greaney.

## Is this the true first?
US Putnam hardcover is the true first.

## Telling it from reprints & book-club editions
Later printings drop the 'First Edition' statement and show an incomplete number line.

## Source
New Mexico Literacy Project — Is *Locked On* by Tom Clancy a first edition? https://newmexicoliteracyproject.org/first-edition/locked-on
CC BY 4.0. Part of the Canonical First-Edition Points of Issue dataset (https://newmexicoliteracyproject.org/api/first-edition-titles.json). Last reviewed 2026-07-03.