International travel and commerce have contributed to a greater rate of introduction of non-native pest species. Reuniting these pests with their natural enemies is seen by some as natural and safe pest control. But is it? This book explores both sides of this controversial and important debate. A decision to introduce a predator or parasite invariably poses risks that potentially will impact the well-being of many stakeholders and may change the flora and fauna of a state, nation, or continent. The authors engage in a respectful dialogue regarding facts and values, and use their differences and commonalities to try to develop mutually acceptable compromises, or at the very least, discern the least damaging alternatives.