Robert Clarke

After exposure to radiation, an atomic research scientist finds himself changing into a murderous, lizard-like creature every time he is exposed ...

A scientist and a gang that has kidnapped a rich heiress come up against a beautiful but lethal alien who has crash-landed her spaceship on Earth.

While watching for a planet that may collide with earth, scientists stationed in Scotland are approached by a visitor from outer space.

A shipwreck victim washes up on a homicidal big-game hunter’s Caribbean island.

Edinburgh, 1831. Among those who undertake the illegal trade of grave robbery is Gray, ostensibly a cab driver. Formerly a medical student ...