Rewriting Past Tragedies, Fixing Past Mistakes

Ekusteria was a wonderful place, where humans and mythical beings/creatures got along, and the world was at peace, and balanced, as it should be.
But then something bad happened, causing a war to break out. Tragedy struck everywhere. Violence, chaos, bloodshed, death, you name it.
Seventeen year old Diana Samantha Roberts is not happy with the way the world is and what they had gone through to get to this point. She wishes she could go back in time and somehow prevent death from happening.
But what happens when the wish to travel back in time comes true? Will Diana succeed, despite all the obstacles she must get through, like making sure she doesn't disrupt the timeline, staying undercover and somehow stopping a war that seemed like it sprang from nowhere? Or will she fail, leading to a fate worse than death? Read to find out and hopefully you don't die from reading this. We are not responsible for any deaths caused by this book.