From the back of the book

The BattleTech Tactical Handbook is an advanced-rules supplement for the BattleTech game universe. The Handbook provides advanced rules and equipment that enable players to add new depth and intensity to their games. Guidelines for creating long-term campaigns and double-blind games, formulas for calculating the combat values of all BattleTech combat units, detailed descriptions of advanced weapon systems and more make the BattleTech Handbook a necessity for the serious BattleTech player.