Exploring reincarnation

I’m currently writing a book whose launchpad is the concept of reincarnation. As the principal character/narrator observes, what’s the point of reincarnation if one is not aware of having been reincarnated? As a concept, the value of reincarnation is in its provision of a means of cheating death, but without an awareness of one’s reincarnated state there is no such comfort.
In the book, the narrator is only provided with glimpses of his previous life, at critical points in his new life, giving him a chance to reflect on what he did the first time round and either make the same or a better/worse decision.
The book’s working title is An Element of Choice, and it will hopefully be published within the next six months.