Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor plot twist

I can't review this without a minor spoiler, so here it is...I don't like time travel as a plot development. First of all, I find the concept unbelievable, but beyond that you always end up with the same concepts (ooh, look, we have a paradox here). I liked the story at the beginning and think that the ideas of dragons that need to fight interstellar 'threads' was pretty original, but it just gets bogged down with the jumping between times. Also, I didn't find most of the characters very likeable. Maybe I would have liked it a bit more if I had read it closer to when it was written.