Take one Moon Base. Add one Ed 'SWORDFather' Valigursky cover [uncredited] and what do you get?
Moon Base by E.C.Tubb.
It's true! Woodsy and Wotan are alien slaves!
No really, from 1964, the plot runs thus:
"The cold war continues on the moon with the bases of each country carefully watching each other. Felix Larsen is sent to England's base to investigate reports of an attempted sabotage. What he finds is incredible. People falling a thousand feet with only minor bruising and someone with the inclination and means for suicide who is unable to commit the act. All inclinations point towards ABIC, the bases manufactured computer brain who is responsible for these events...but how and why is it doing it?" [Neil Morey]