This is Against The Galileans by Julian, the Roman emperor, translated by Wilmer Cave Wright. It is a work in the public domain (both the original and the translation). I am reading from here: https://en.wikisource.org/wiki/Against_the_Galileans
Emperor Julian was raised Christian but left the church and converted to Paganism (ergo he is sometimes called "Julian the Apostate"). He wrote this treatise speaking against Christianity (he calls Christians, "Galileans"). I first was recommended this book as a paperback on Amazon, which quickly went out of stock before I bought it, and the rare copies in print I could find on ebay are hella expensive (and usually in a larger compendium type work). So I went looking for it online and found it on Wikisource, since it's public domain. Subsequently I didn't notice any audiobook copies of this either, so I was inspired to read it aloud for anyone who needs or prefers an audio format and wants to access this text.
DISCLAIMER: I am not a professional, and I do not own professional equipment. I make mistakes, I say "excuse me" sometimes when I make a mistake, I mispronounce some of the proper nouns, and the simple headset you see in the photo is what I used to record myself reading. Please don't flame me for this being an imperfect copy; I'm just trying to make it more accessible, even though I am flawed. :)
Also note, there are some fragments on the website where I am reading from that I did not read aloud because they are really just a few lines here and there out of context. There is an incomplete record of this work, mostly strung together from quotes used in other works referencing it; we don't have a complete copy of it by itself. Ergo, what I am reading is "book one," but there were no further books past that (except for the fragments).
▶️ 3Speak
Do you read the novel about Julian by Felix Dahn ?
He was not only a great novelist, but a historian writing about the last battle of the Ostrogoths in Italy against Justinian (Narses, Belisar) and was one of the best History-researchers of Germanic history .. His novels of course have some artifical touch but always are based on fine research ..
https://www.unipa.it/dipartimenti/cultureesocieta/riviste/hormos/.content/documenti/11_Simone_Rendina_Hormos13_2021.pdf
No I hadn't heard of that one before!