When I became a Christian in 1974 I had a voracious appetite to learn as much as I could about my new faith and the beliefs of those who challenged it.
I read the book "Death of a Guru" in about 1977 when it was first published.
It is still in print.
It opened my eyes to the spiritual world that is in opposition to Jesus.
This link is to a talk by its author.
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He was brought up a as Guru and then Jesus broke into his life.
I recommend anyone searching for truth buy the book which Rabi mentions in this talk and please watch the video..
https://www.youtube.com/watch?v=FmsAlKA8lvs