First edition | |
| Author | Victor Canning |
|---|---|
| Language | English |
| Series | Rex Carver |
| Genre | Spy thriller |
| Publisher | Heinemann |
| Publication date | 1966 |
| Publication place | United Kingdom |
| Media type | |
| Preceded by | The Whip Hand |
| Followed by | The Python Project |
Doubled in Diamonds is a 1966 spy thriller novel by the British Victor Canning. It is the second in a series of four novels about Rex Carver, a private detective drawn back into his old profession of espionage.
Carver is hired to find a man who has failed to claim an inheritance, who is turns out has been involved in a diamond heist. His mission takes him to Dublin and France, and draws him into a plot overseen by two Chinese twins, who are agents of the communist government, to sell drugs and earn hard currency for their country.