Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: This is a purely academic appetizer.
Review: Vistors to another culture are often tempted to buy things they think as artwork, which people in that culture simply use daily. To even tempt vistors (into buying them), such "artwork" are often carefully re-designed to tailor to the visitors' tastes. Such is the case with this secret book. It tries to sell functional programming to you cooked in Java. Those dishes are mediocre in functional programming culture, but might arouse curiosity of a Java-centric programmer. Most of those who praise this book with five stars are like (fooled) buyers who spend $20 on something like a Chinese fly bat.
