This book was not to everyone's taste it has to be said although all agreed that it was well written. The lack of speech marks was difficult for some to follow and not too many found the will to read to the end. One thing that was unclear was where the Kibsu originated and whether the Trackers were from the same lineage. The mixture of fact and fiction was appreciated and the time shifts helped to explain the main purpose of Mia and Sarah and to outline just how long they had been working towards their goal. The references to climate change were pertinent and enlightening again to show how long the problem has been recognised and necessary actions considered. We felt the story ended too abruptly but then realised that it was intended to be the first of a trilogy. Very few felt they would read the next books. We gave it a score of 6 out of 10 which reflected some who scored it very highly and those who did the opposite. A marmite book.