Inside the minds of mass murderers: why they kill

Introduction: Mass murder and its classifications

Howard Unruh: America's first modern mass killer

Buildup to horror

The classic mass murderer

Mental illness and the compulsive killer

Deadly children

Family massacres

Going postal: the disgruntled employee

Visionary mass murder: religion and politics

Spreading the damage

Murder on the side

Stress, murder, madness, and risk assessment.