Ah! Just got into the life after death topic... what is our life on Earth about. And really this is controversial. It started when I read this book just last weekend, hasn't slept much since that, try to gather information and I'm getting mind-blown at every step. The book is Journey of Souls (https://www.amazon.com/Journey-Souls-Studies-Between-Lives/d...)

There is a good summary on Youtube: https://www.youtube.com/watch?v=Lzwle9gjC2E