Review: Scott Tyler is a Shifter. He's able to change any decision he's ever made and replace the time with a different set of event. He loves the idea, but soon realises that not all Shifters do so with the intention of winning a bet. A few Shifters have gone rogue and are trying to stop the deterioration of Shifting abilities after adolescene using really...unconventional methods.The idea behind shifting is original and really really cool. It definitely gets you thinking, as does the prologue.Things get going really quickly. Aubrey, ARES (the organisation that organises Shifters) and the concept of Shifting come in within the first 50 pages, and are easy to pick up.The training/getting to grips with the powers takes up about half the book. It's definitely intriguing and nice to see him make friends with fellow Shifters and learn theory and whatnot, but there were times when I wanted the story to note on a little bit. And then it did. We get a short overview of the time, and then a themystery builds up with mysterious killings and Shifts to cover these up. Ooh. In terms of interest levels: high, then dip a little, then really up high until the end.The characters are likable in various measures. Aubrey and Scott were good characters that kept you rooting for them. Benjo...I have no idea how to describe him. He's a little bit lovable, but really quite disgusting when you think about it. My favourite (collectively)has to be the group of Shifter kids. I would have liked to see a bit moredevelopment from all of them though.The writing was good, clearly conveying Scott's attitude to things. I love how Kim doesn't shy away from graphic descriptions. This book is not for the squeamish,especially round the halfway mark.The ending was a bit sudden, but logical and really nice. It's sudden because everything's ramping up and you know there's only a couple of pages left but you can't see how it's going to end and then it does in a really awesome way.Overall: Strength 4 tea to a novel with a fun idea and a fast moving plot that keeps you reading to the end.