This is a great new series. The dystopia in which the characters live, an enormous underground silo, is an original premise and you really are gripped from the opening chapters. It has a complex and well-constructed plot line, which actually makes it difficult to predict what will happen next and there are a number of very unexpected twists. The community who lives in this underground silo have very strict rules, the most important of which limit hope for the individual: you cannot mention the outside or what happened to drive them into this silo life. At first I wondered why the author had included some of the earlier characters and plot points, but as you get further in you realise why. A very enjoyable read; I definitely want to read the rest of the trilogy!