In case any of you are wondering,this book is a sequal to an earlier book of Ms. Dillard's:TOS #30:Demons(look for my review on this book also).The two book have basically the same storyline(aka. energy beings that feed on fear invade the Enterprise)but not the same plot.This book was definately chilling.The author really makes you feel Deanna's instense fear of these creatures.Like its prequal,a MUST read!