Instruct: Classify a given review as either positive or negative.
Query: Very informative read!

He provides a couple secrets from Brazil such as ACAI and GUARANA, two fruits full of energy found only in the Amazon rainforest.Unlike other books on the subject of martial arts, Royce Gracie explains both the physical and spirtual side of the art. “Royce Gracie is the baddest man on the planet. If everybody trained like Royce, everybody would be a champion.” —Oscar de La Hoya, Olympic boxing gold medalist and World Boxing ChampionI'd recommend reading the book and ordering some guarana powder!