As a science fiction novel, this is terrible. It pretends to be hard sci-fi, but is actually very soft sci-fi. It's almost like Quantum Leap, if Quantum Leap was written by an idiot.

As a historical fiction, however, this book is very fascinating, and really well-written (albeit with a few minor historical inaccuracies).

In addition, it was really hard to get through the first book (both books make up one single story), as the main characters were three of the most unlikable, whiny, childish people I've ever read about. They did eventually grow up and redeem themselves partway through the second book, but I'm honestly amazed I was able to continue reading after how bad the first book really was.

How this woman won a Hugo and a Nebula Award is beyond my understanding.

Also, if the ending of the movie Premonition really annoyed you, don't even start this book, because it will seriously get on your nerves.