Gavin de Becker, a bodyguard and security expert, is the author of The Gift of Fear, an invaluable work on how to trust one's intuition and avoid or escape dangerous situations; he's written two follow-ups, The Gift of Fear, dealing with the protection of children (this one has some useful information regarding the autistic spectrum, including safety hints for the intuition-deficient) and Fear Less, dealing with security in a post-9/11 atmosphere. (The latter two titles, since they contain a lot of repeated material, can be regarded as specialized editions of The Gift of Fear.)