It's not necessary to have read The Last Policeman to enjoy this. The best part of the novel is the way the author realistically portraits civilization knowing that an asteroid will impact the earth. Some people join a cult, others hoard food and supplies. If you can get past the flimsy premise that begins this book, it's an enjoyable read. Why an officer would undertake a monumental task for someone he doesn't know very well and expects nothing in return is a bit far-fetched especially since there's less than three months to go until impact. I was impressed that this book didn't slump which has been known to happen to second books in a trilogy. It's very well paced and captures the attention of the reader from the start. I will definitely pick up the concluding novel in the series.