- Published: 1966
- Hugo Award for Best Novel, 1967 —
- Nebula Award for Best Novel, 1967 —
In "Babel-17," Rydra Wong, a poet and code expert, must break an enemy government's code, but discovers that the code is really a supersophisticated language, while in "Empire Star," a simple-minded teenager is entrusted to carry a vital message to a distant world.