3.5 stars
This is a YA fantasy/fairy story with all the things that a YA audience would love: secret passageways, witchcraft, an Elf Queen, an old mansion, and dark secrets in the family of twin girls, Chloe and Zoe. The story centres around the mosaic, which has existed for thousands of years, but the pieces are scattered all over the world and have magical powers. And the twins are on a mission, that could prove deadly, to discover the mysteries contained within the crumbling mosaic. They battle evil forces, along the way, and discover even deadlier secrets within their own family.
From a YA point of view I much preferred the chapters with the voices of the twins rather than those with Severin, whose voice I felt was too adult at times, with words used that a YA audience wouldn't necessarily empathise with or understand.
There were a few things that didn't make sense though: Why the twins are apparently identical, but one is blonde and the other brunette. And one of the twins, Chloe, wonders if her sister, Zoe, was really her sister or a 'clone gone wrong', because they didn't look that much alike. In that case why call them 'identical'? It's stated that the 'identical' link is because it's biological, but it's down to whether they look identical or not at birth that states that fact. Non-identical twins can look very different from each other so that didn't make sense.
I also felt sometimes the responses from the twins to shocking news was a bit inauthentic at times. For example, without giving any plot spoilers, the grandmother tells the twins, about a family member who dies, 'a stranger, another collector killed him'.
And the response from Zoe is 'Eew!' which is a very odd response to that kind of news, and more apt for a response to a bad smell or taste. And responses such as these made me feel at time that the twins lacked depth, and weren't fully fleshed out as characters.
There have been several TV shows and books centred around a mosaic - I was reminded whilst reading of the Supernatural TV show, '666 Park Avenue' that has a mysterious mosaic in the basement of an expensive Manhattan high rise apartment, where mysterious deaths happen. The show was loosely based on a novel with the same name - so this concept wasn't particularly original - but overall this is an enjoyable read and a creative fantasy that most children and adults who like fantasy YA novels, will enjoy.