There is a superb book available, titled "Emergency Navigation" by David Burch ISBN 0-87742-260-5., first published in 1986. It is available in paperback for $16.95 from www.celestaire.com and other sources.
It's widely recognized as the bible of emergency navigation. Uses both ancient and modern techniques and is comprehensive. It is mostly oriented towards the ocean navigator but certainly applies to terrestrial navigation as well. Tom
