This is the one book I would universally recommend. It's well written and useful.
This book looks not at just behaviors in disasters/emergencies, but case studies, data, and the science behind those behaviors.
I found it totally interesting to see the reasons behind, not just behaviors of survivors in the case studies, but being able to understand my own behaviors in the disasters/emergencies I've been in (especially: how is it I froze here, when I was totally awesome there).
I love how the author researches using data and interviews researchers to see what they've found and how she looks at different criteria or influences in how people behave (privilege and social programming matters, yo).
My second favorite part of the book is how she's shown that public officials and others in authority totally discount the average person and the public.
My favorite part of this book is giving me the ability to look at my own behaviors and see how much power I really have. (also, I deserve a lot of bonus cookies for all of those breathing exercises, meditation, and yoga).
So yeah, get ye to the bookstore or library and read this.