this series of books has represented a unique approach to the apocalyptic literature that I have been enjoying for a number of years now. I find it absolutely fascinating that repeated apocalyptic events include some of the same characters. In this last book, there has been a unique sci-fi approach connecting the other books, and other iterations, as they are called. initially I didn’t like it , because I want pure apocalyptic literature without a science fiction take. But, I actually find that it adds some depth and interest to the types of stories that I’ve been repeatedly reading by different authors for the last 6 years. I can’t wait for the next one