Risk Management for Meetings and Events (Events Management) by Julia Rutherford Silvers: One of the most comprehensive guides to keeping people safe at your meetings.
Global Meetings and Exhibitions by Carol Krugman CMP, CMM, and Rudy R. Wright CMP: Carol Krugman is a recognized expert in contingency planning, especially for international destinations, and this book is essential for global planners.
Making Things Happen: Mastering Project Management by Scott Berkun: An easy-to-read book about overall project management, with a chapter on "When things go wrong!”