Reddit mentions of Lords of the Left-Hand Path: Forbidden Practices and Spiritual Heresies

• Works of Don Webb
  
  
• Works of Michael Aquino
  
  
• Lords of the Left Hand Path by Stephen Flowers
  
  
• Stairway to Heaven Chapter 1 and The Dark Lord by Peter Levenda.
  
  
  
• Fire and Ice by Stephen Flowers
  
  
• The Invention of Satanism

Please read the sticky in this sub. Otherwise, many of the answers to the questions you're asking here can be found in books, so I'm going to recommend some:

1. The Satanic Bible. If you're interested in Satanism, this is one of the best places to start. You'll probably find a lot of the answers you're seeking within its pages. It's a short read, might take you a day tops to get through it.
   
   
2. The Invention of Satanism. This is an excellent academic text. It has no agenda outside of providing history on Satanism itself as a religion. It covers early origins of Satanism (aka devil worship), the romantic Satanists such as Milton and Blake, the beginnings of the Church of Satan and LaVey's origins, the Temple of Set, all the way on up to modern day with The Satanic Temple.
   
   
3. Lords of the Left Hand Path This would be considered more advanced reading, as it delves into a general Left Hand Path philosophy rather than focusing just on Satanism. It's a dense book, but will go a long way to filling in the 'sacrifice, magic, evil' part of your post.

Writing about secrets is a very tricky business. By definition fact-checking is impossible and none of it should be regarded as non-fiction. I have found a very small number of authors present as intelligible a description as can be found. These include: Gershom Scholem, Joscelyn Godwin, Ronald Hutton, and Wouter Hanegraaff. Whether or not they are or were actually practicing occultists is not known to the public.

The single most important fact which is not discussed at all by people who talk about an Eyes Wide Shut or Ninth Gate style occult order is that above all else magic is a weapon of the weak. Rothschilds and Rockefellers may have spectacular Halloween and Carnival parties, but when they want to get something done they pay cash; they don't do a magic ritual. Listen to Styx's interview on RedIce Radio. He seems to be one of the very few who has a clue on this topic. I disagree with him on a hundred other topics, but he has this one nailed.

A good overview on black magic is Stephen Flowers Lords of the Left Hand Path.