A slow burn story where you are taken into the esoteric world of physics gently so that you understand the concept of the multiverse and what happens when you kill your grandmother!
A multiverse is, apparently, a hypothetical collection of identical or diverse universes, including our own.
And of course there is Schrodinger’s cat to help us understand it – when you open he box he is there and dead, there and not dead, or not there at all and you don’t know which until you open the box.
…. the question commonly asked about your grandfather also apparently has many different answers –maybe as many the multiverses themselves!
- You may have prevented yourself from being born and thus when you return to your own timeline you are an anomaly with no previous existence.
- You can’t return as you no longer exist anywhere.
- You haven’t made any difference as you killed your grandfather in a different universe
- and so on…
In this book a different concept is proposed, that you can go not only to a different universe but also to one that it is running at a different time, and thus the connection between the two keeps throwing you into a different universe with different histories. In each universe you enter with your old memories but you gradually lose them and remember a new history.
So as you go back and forward between these universes you affect the one in which you end up until you are in one where the history you want is the correct one for that universe.
I just wish I knew more about theoretical physics before reading this book but I am fairly sure that time travel is less likely than universe hopping so I am doubtful that she really affected the timeline, merely that she ended up in the universe where she liked the timeline and family history.
I have to give this a 5 for stretching my brain uncomfortably!