Instruct: Classify a given review as either positive or negative.
Query: Lilith's Brood is wonderfully complex and believable

One of the best sci fi books I've read in quite awhile (and I read a lot of them). The complexity and believability of the story make it fantastic. Butler also succeeds at creating a new species and actually showing us our world and society through their eyes, quite a feat to do well. She also creates a diverse atmosphere of all kinds of people (different backgrounds, races, languages) coming together under adversity. The struggles that the humans in the story have with accepting ideas and concepts completely outside of their experiences makes for very thoughtful reading. This book (actually 3) makes for very interesing exciting reading (I couldn't put it down) combined with lots of thought provoking material.