Even though this is the first book in the series this is the most recent one I read. These books can be read as standalones but there are little things here and there that bleed into the other books. This one is all about the security company getting started, Missy getting integrated into the company, and this pack getting started. Missy and the security company do seem to pop up in all of the books so far, usually towards the end. I loved seeing Scarlet here! She's so far, my favorite of the whole series.  Anyway, this one wasn't bad, but I felt like it was a little bit slower than the other ones so far. But I'm glad I finally went back and read it since I've always been curious about it and meaning to go back to it since reading the other books in this series.