book KoesterLost Person Behavior:

A search and rescue guide on where to look - for land, air and water by Robert Koester.

Lost person behavior is the cornerstone of search and rescue efforts. Based upon a landmark study, this book is the definitive guide to solving the puzzle of where a lost person might be found. Nowhere else is it possible to learn about the latest subject categories, behavioral profiles, up to date statistics, suggested initial tasks, and specialized investigative questions. Whether the subject is underground, underwater, under collapsed rubble, on land or has fallen from the sky, this book delivers what search managers need.


The cost of the book is only $25.00. (plus shipping and handling)


Lost Person Behavior provides the reader with:

  • an indispensable book that can be used as a field reference (special rugged binding allows the book to lay flat) and an essential library reference


  • the latest search and rescue incident statistics from the International Search & Rescue Incident Database (ISRID), which contains over 50,000 SAR incidents


  • 41 subject categories, many of which are new and presented for the first time


  • new detailed behavioral profiles that give insight into what drives the basic behaviors of lost people


  • statistics based upon ecoregions to best match your specific search areas


  • the ability to pinpoint the most likely areas to search, then determine initial tasks quickly using reflex tasking, the bike wheel model, and quick consensus

Take the Lost Person Behavior Course

Professionally presented classroom sessions will incorporate table-top exercises, using the latest research from Bob Koester and his Lost Person Behavior book. 

  • Study planning and operational considerations for managing search resources
  • Learn about dozens of missing person category specifics
  • Use actual search mission table-top exercises to apply learning points

Take the Lost Person Behavior Course

"Our skills, organization, volunteers and equipment help(ed) lead to the safe location of the child. We used the behavior book and the child was located 1.5 miles from home well in the parameters of the book. This class really helped us out with a successful outcome. Thanks."
Chris M. - Marion County, WV HSEM