I was 15 when I last read it.
It introduces, by a dual storyline, the possibility of reincarnation. Initially set in the 60's (or 70's - I forget) and, by introduction, explains how the Akashic records may apply. The reader is offered the freedom to choose how they interpret the story. Afterall, not everyone is comfortable or willing to consider the possibility of reincarnation.
Recently Cosmology/Cosmonogy has offered an alternative view of the world with the multiverse theory. The big bang and string theory (once considered disparate) are now recognised as possible corroboration.
Einstein explained relativity, but his theory is considered to be incomplete, although the addition of an 11th dimension - inclusive by string theory - does, at least appear to, complete Einsteins theory.
He also suggested that all time exists now.
Modern science is currently endeavouring to explain how that applies, within our present knowledge frame of physics.
Time itself has been re-evaluated, now correctly termed "Space Time".
Language is still evolving, though underlying is definitive interpretation, collective and individual.
Take an old song, "Scarborough Fair", as it's now spelt.
Generally considered to be referring to a market fair held in the North East of England some centuries ago. An old and haunting melody, though no one is certain of it's origins, or implicit meaning.
Curious lyrics, associations with magic - Parsley, Sage, Rosemary & Thyme
What seems certain is that there's an underlying message, perhaps only the gist is gained through the lyrics - more pertinent, mayhap, is the sound of the refrain
Scar
Borough
Fair
Parsley
Sage
Rose
Marie
And
Time or Thyme?.
