A text book (binder) and "pocket" field guide in search theory and operations as used in CA were both titled "Search Is An Emergency", I believe.
These are two excellent classes, if you are a member of a team in CA:
-Direction and Control of the Search Function,
Search Management Course
-Direction and Control of the Search Function,
Winter SAR Operations Course
http://www.oes.ca.gov/Operational/OESHome.nsf/0/FC657A5F8E9F6FC888256EC10077EBC9?OpenDocument There are some relevant book titles listed here:
http://shop.eri-online.com/category.sc?categoryId=2 Reading a book is no substitute for training or experience. Untrained searchers can complicate and delay the discovery of a lost person, at the least.