| Secret Agent of Terra | |
| Author: | John Brunner |
| Cover Artist: | Ed Emshwiller |
| Country: | United States |
| Language: | English |
| Series: | Zarathustra Refugee Planets |
| Publisher: | Ace Books |
| Release Date: | 1962 |
| Media Type: | Print (Paperback) |
| Pages: | 127 pp |
| Followed By: | Castaways' World |
Secret Agent of Terra is a 1962 science fiction novel by British writer John Brunner. It is the first book of the Zarathustra Refugee Planets series; the other books are Castaways' World (1963) and The Repairmen of Cyclops (1965). Secret Agent of Terra was first published as Ace Double F-133, with The Rim of Space by A. Bertram Chandler.
Brunner later reworked the story for his 1969 novel The Avengers of Carrig.
. Donald H. Tuck . The Encyclopedia of Science Fiction and Fantasy . Chicago . . 1974. 0-911682-20-1 . 71.