Adaptive Instinct by Kristal Stittle: I loved Survival Instinct, the first book, and worried that maybe the sequel would not live up to it. However, if anything, the sequel is even better. I love the new look, too. This book can stand alone without having read the first book, but you're really missing out if you don't start with Survival Instinct. This is a nice long book, just like the first, with another satisfying ending. If you enjoy survival books that take place after an apocalyptic event, buy these books!