Non-fiction category laughable.
With important classics like Imperium and On Genetic Interests to choose from, it’s not unexpected that “movement” dimwits would instead pick the trash of “Robertson” and Kemp. Anyway, this topic could be the foundation of an interesting podcast; how about a enlightening discussion between Taylor and Thomas Jackson?
If I had to choose? I’ll pick two in each category and then one book series (and a runner-up) in a new category. Non-fiction would be the two books mentioned above. Fiction would be The Brothers Karamazov (for the reasons given in the link) and Moby Dick, a sublime meditation on aspects of the observed and hidden worlds, and an excellent literary exposition on the Faustian character – is there in literature a more Faustian character than Ahab?
In a special fiction category of science fiction/fantasy, I’ll skip the obvious “movement” pick of March of the Titans, and go with Gene Wolfe’s The Book of the New Sun series, which is analogous to The Brothers Karamazov and Moby Dick for this category. The work of Jack Vance would be a collective runner-up here.