Dr. Quigley, Dr. Vecchi, and Dr. Wallace bring this second edition of the Evidence-Based Hostage / Crisis Negotiation Reference Guide based on practical and academic application used in the world of crisis negotiations. The first edition was published and distributed throughout the Hostage / Crisis Negotiation community with the hope of feedback to assist in this new publication. The positive and negative feedback (and there were many) brought about this new edition of evidence-based crisis negotiation techniques in hopes to help those in this field.