Uninvited Visitors: A biologist looks at UFO's by Ivan Terence Sanderson

Neville Spearman 
1969 
Hardcover 
1st British Edition 
244 Pages 
14.5 x 22.5cm

Condition: Ex-lib, Good

Father of cryptozoology, Sanderson applies a biologist’s perspective to reports of unidentified flying objects, proposing that some UFOs could be organic or non-human lifeforms rather than traditional spacecraft.