No offense, Numbers came off as a bit of a rubbish story. I mean, the premise is exciting; a girl who can see the death date of other people, sort of like Death Note, Volume 1: Boredom. But in this novel, that premise isn't really explored. What transpires is basically our heroine trying away from authorities with her friend, Spider. 
 The one thing going through my mind the entire time while reading was, why did they run in the first place? They shouldn't have! Without spoiling anything, running really didn't help their situation and was entirely unnecessary in my opinion. 
 Basically, the novel is pretty much the two of them witnessing a terrorist attack and then going on the run for it. Subsequently, they fall in love. I'm sympathetic to the fact that being on the run for your lives tends to be a stressful situation and such stress can lead to love, but their romance just came off as contrived to me. 
 Numbers is also essentially a British novel so there's a lot of British slangs and Britishness about it. The ending was predictable and honestly, anti-climatic. (view spoiler)[Jem getting pregnant after only having sex with Spider once, MAYBE, twice at most? Typical. (hide spoiler)] The only reason why I'm still continuing with the series is that I've been told that the sequels are better so let's hope they are! :)