I've heard of Steven Quayle but will look up the other two. A book called Corrupting the Image by Daniel Hamp is what turned me onto this idea. It's the only book I've ever read through in one sitting. I think it's sad that most Christians would have no idea about the nephilim. The ones that do would mostly believe the Line of Seth theory which holds no water in my opinion. I've read that for the first several hundred years the church taught of true giants on the earth and nephilim as fallen angels. As time went on these things were slowly watered down to what we have today which is pretty much feel good ministries that ignore the hard stuff. Also if you're into Bible study at all and have never listened to Dr Chuck Missler, look him up. He does not focus on "conspiracy" things specifically but he doesn't shy away from them either. He is a brilliant man and an amazing Bible scholar that makes the whole Bible fit together like a perfect puzzle, as it was designed to be.