Those three books are pretty bad. Anarchist's Cookbook isn't half as interesting as you think it is. The recipes in it are inefficient at best, dangerous to yourself at worst. US Military has legal books hosted on their own site for improvised munitions that are much safer - just don't do anything stupid like throwing your life away. Mein Kampf is somehow uninteresting, and Turner Diaries has unironic BNWO shit in it.
>>16510483 is a very good recommendation. I'm not Christian either but his ideas and concepts are just sublime. He was clearly someone haunted by his past, and the book is his journey healing from that.
For me, The Nicomachean Ethics by Aristotle helped me a lot with my own personal philosophy. Anything by Aristotle is great, and you can basically skip straight ahead to Descartes from him if you're interested in metaphysics. Kant changed my life but that's such a hard read I wouldn't recommend it until much later.
If you're more looking for fiction, try Edgar Allan Poe, Bram Stoker or Mary Shelly. If that's too dark, try Lewis Carroll (he wasn't a pee dough btw, that was an entirely unsubstantiated lie made by one bitch a century after his death based solely on a missing diary entry) or George MacDonald. If that's too avant-garde, try literally anything by The Inklings (JRR Tolkein, CS Lewis).
HP Lovecraft was already mentioned by
>>16510532, so instead I'll recommend Thomas Ligotti - the only real protege of Lovecraft imo