The book won a Hugo Award for Best Novel at the 27th World Science Fiction Convention in 1969, as well as the 1969 BSFA Award and the 1973 Prix Tour-Apollo Award.
Buku tersebut memenangkan Penghargaan Hugo untuk Novel Terbaik di Konvensi Fiksi Ilmiah Sedunia ke-27 pada 1969, serta BSFA Award 1969 dan Prix Tour-Apollo Award 1973.