Sith philosophy is so interesting to me. Why be a Sith? What do they believe? Like its companion book, The Jedi Path, Book of Sith clarifies a lot of details that are ambigious or glossed over in other Star Wars media. Fascinating for a hardcore fan, but probably not terribly interesting to more casual folks. My one complaint is that I wish there was more commentary across the whole text, like in the companion book - but I understand that would've been difficult to do from an in-universe perspective.