Maybe it's best to leave the past in the past. Just how much of a past-life regression session do you need? If you want to delve into the whole "who was I in some other century and how is it impacting my life today" approach by dissecting a previous incarnation, well ... go ahead then. Even when a past life is confirmed it doesn't mean you were that person. In fact, Jung's collective unconsciousness says that we are all connected. Depending on the kind of brain wave patterns you go into during a "past life" visit, there is a chance that the 95% of the brain humans don't used was activated. And you tuned into someone else's life from a long time ago. Think about it ... we are connected to our close friends and often experience strange mental resonances and synchronicity. My advice: let the dead rest.
As for Lynn Andrews book ... enjoy it, see how it helps y ou, treat it like inspiration fiction, but do not go looking to the past too much. Life is lived forward.
This book helped me find and make sence if my spiritual path. It opened my mind to new ideas. I would definutally recomend this book to anybody who is pagan or just curious about shamanism. ---peace out