Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Great Book

Gillian and Melina Lloyd are a pair of identical Dallas twins who switch places with each other.Gillian switches places with her twin, a media escort, and chauffeurs sexy astronaut, Chief Hart, around town. Suspicion falls on Chief Hart when Gillian's mutilated body is found the next day.Gillian's cocky boyfriend, Jem Hennings, has a vested interest in focusing police efforts on Hart, but Melina has her own reasons for thinking him wrong. Jem's connection with a charismatic preacher known as Brother Gabriel is at the heart of this mystery, in which Melina tracks Brother Gabriel to his lair and uncovers his diabolical plot while simultaneously revealing her own dark secret. The ending has some really good parts, including some sex scenes that are better than most of romantic thrillers of this sort.This is definitely a book typical of Brown's writings.I recommend it to anyone who likes a good mystery.