The Chocolate War is by Robert Cormier. A must read classic for all young readers. This book is The Lord of the Flies set in a private school. When Jerry refuses to sell chocolates in the annual school fundraiser he not only runs afoul of Brother Leon, but of The Vigils, a secret group at the school. The results are tragic and make you realize afresh the dangers of the mob mentality.
Ratings: 10th grade - 10 out of 10 - P (profanity) - AC (mature thematic content) - V (violence).