For those who’ve been reading Christine Rains’ 13th Floor series, today is the official release of the latest installment, “The Harbinger.” And if you haven’t been reading this series . . . Why not? They’re fun, quick reads. Go pick one up. (“The Harbinger” is one of my favorites, but I also really liked “The Dragonslayer,” and “The Alpha” was pretty good too.) Over the next couple months Rains will release the final two stories. So hurry and catch up!