Fortress / Gabrielle Lord 91 p.

A rural outback teacher with her twelve students are kidnapped and held for a million dollar ransom by a gang of ruthless criminals.  Sally Jones keeps her head and uses what she has to keep her charges safe.  She foils the gang when they all escape from a remote cave; only to get back into their clutches as they seek asylum in a farm house.  The homicidal psychopath leader goes crazy when they escape a second time and Sally Jones must face him again to keep her students safe.