For your pleasure, some reading suggestions (in no specific order):
Applebaum, A. "Autocracy Inc."
MuirHead, R. & Rosenbaum, N. "A lot of people are saying"
Lawrence, D. et al. "The international alt right"
Neiwert, D. "Alt America"
De Berg, H. "Trump and Hitler"
Merlan, A. "Republic of lies"