Kai Dante's Stratagem: Book Two of the Oberllyn Trilogy

Kai Dante for President, indeed! The Oberllyns are back, and the family think tank is successful in diverting the virus that is destroying the fertility of the populace, but in return, Sanctuary is attacked and the family members are scattered to fight radiation sickness alone. Given only a strange poem they are sent by the Ice Lady, will Kai and Micah figure out the puzzle before they all die? Will any in the family survive to destroy the tyrant running the Brotherhood? And what do the Guide-stones have to do with all this?