Seal men (2),
Ganymede (2),
invisible asteroid (2),
Librivox (1),
World is Not Ready (1),
Growth (1),
contemporary (1),
only Earth (1),
only humans (1),
scientist (1),
New York City (1),
spies (1),
scientists (1),
hypnotic machine (1),
invisibility (1),
space pirate (1),
Venerian princess (1),
earth borer (1),
digging rays (1),
lost race (1),
Iapetus (1),
space raid (1),
submarine fight (1),
paralysis ray (1),
heat rays (1),
intelligent octopi (1),
octopus city (1),
shrinking (1),
invisible man (1),
brain transplant (1),
religious (1)
Back to the Summary Bibliography page for D. W. Hall