Lucifer’s Hammer is a classic in prepper fiction – The plot of the book contains several interesting twists that are useful to begin a prepper conversation. For instance – if you have a BOL (Bug Out Location – aka cabin in the woods) what would you do if you arrived during a disaster to find it was occupied? In this book the catastrophe was a comet striking the earth. While unlikely, it is plausible. There really isn’t anything in this book that is outside the realm of possibility – which is rare in science fiction… Good read, I enjoyed it.