I really liked the first book in the series, The Forest of Hands and Teeth, but this one didn't quite do it for me. No spoilers, but the main character made some highly questionable decisions from the start. Several more bad decisions later, I found it impossible to root for her. 
 The narrative is also written in the present tense, something I generally do not enjoy. It tends to feel either pretentious (as in postmodern lit) or immature (as in written by a teenager). I got past it in the first book, perhaps because the plot relied more on the horror than the love story. There was much more emphasis on the romance in this book, so it leaned a bit too far toward the teenage prose for my taste. Of course your mileage may vary on this. (The first person present tense seems to be cropping up quite a bit in the YA stuff, so folks must be enjoying it. Maybe I'm just old and crotchety.) 
 Still, I'm giving this three stars because I thought some of the elements of the zombie apocalypse landscape were pretty compelling. If you like that sort of thing or are into YA romance, then I can still recommend this. Despite the above complaints, I still plan to read the third book to see what happens.