This is the complete and unabridged translation of the classic Sefer Chafetz Chaim on the laws of Shmirath Halashon, how to guard one's tongue from slander and other evil. This unrivaled authoritative work written by the "Chafetz Chaim" has been studied for over 100 years by scholars and laymen alike. Now available in English, translated by Rabbi Shraga Silverstein.