Aside:

Deathworld (Harry Harrison) is a classic scifi trilogy from the '60s. It was kind of a "macho adventure fantasy", like James Bond in a scifi setting. Same author had a similar character style with his Stainless Steel Rat series.

The stories have twists and turns in the plot to keep it about as interesting as a James Bond plot. Which is to say, not that great, but entertaining enough now and pioneering-the-mainstream for the day.