Instruct: Classify a review into positive or negative sentiment.
Query: the premise is found wanting

The premise of the book is disturbing. Any book which tries to pass itself off as a spiritual guide and offers the beings which dwell below as models must have alot to answer. All spirits were originally created good, some rebelled against their creator and decieve humans with a false "light". Could these be the dwellers beneath? What make us so more advanced than the medieval European theologians who also agreed that the earth is hollow, and not filled with cities of light, but rather with cities of the damned and the apostate angels? This is not negativity, only speculation, for reality is not always nice, and the truth can be painful.