Reddit reviews Nietzsche and the Politics of Aristocratic Radicalism

Here are two good ones i've read, neither of them shy away from treating the obvious anti-egalitarian/elitist strain in Nietzsches thinking:

https://www.amazon.com/Nietzsche-Politics-Aristocratic-Radicalism-Detwiler/dp/0226143546

https://www.amazon.de/Nietzsche-Biographie-Denkens-R%C3%BCdiger-Safranski/dp/3596151813

My friend also recommended me this one, i haven't read it yet though:

https://www.amazon.com/Nietzsche-Aristocratic-Rebel-Intellectual-Balance-sheet/dp/9004270949

As for Nietzsche's connection to Nazi ideology, i saw that Alfred Bäumler was already mentioned, which probably is a good start. Other than that you might want to read Armin Mohlers "Die konservative revolution im Deutschland" which doesn't treat Nietzsche exclusively, yet the author draws a connection between the crypto-nazi "revolutionary conservative" movement and Nietzsches thought. I highly recommend it.

https://www.amazon.de/Die-Konservative-Revolution-Deutschland-1918-1932/dp/3902475021