Update: I enjoyed the book much more second time round when I knew what is going to happen and who the good and bad guys are. Mac, although still very innocent despite grieving for her murdered sister, is much more enjoyable even in her 1.0 rainbow version when you get to know her as a more complex character in the series and know that the rainbow girl is just a one small part of her. 
 What I especially like about characterization is that Alina's murder isn't just a setting to get Mac to Dublin, which is forgotten 50 pages later as soon as the story gets moving. Alina's memory follows Mac throughout the whole series and is a very integral part of her character. 
 Original review: 3,5 stars so far, might increase the rating after reading the whole series. This book really felt more like a world-building book than a whole story, especially the ending wasn't much of a one. It was more like end of chapter 25 where chapter 26 didn't follow. Luckily, I have the next book co I can continue Mac's story. 
 Higlights of the book - a future kick-ass heroine who owns up to liking pink nail polish, very interesting mythology, great set up in Dublin (makes me want to visit the city again) and heaps of sexual tension between the two main characters.