Meleager (1916) by Herbert M Vaughan
The Strange Invaders (1934) by Alun Llewellyn
Congratulate the Devil (1939) by Howell Davies
Dangerous Waters (1952) by Islwyn Williams
Y Blaned Dirion (The Gentle Planet) (1968) by Islwyn Ffowc Elis
Survivors (1975) by Terry Nation
The Space Eater (1982) by David Langford
Aztec Century (1983) by Christopher Evans
Chasm City (2001) by Alastair Reynolds
Jigsaw Men (2004) by Gary Greenwood