This is a must read book for all action thriller enthusiasts. Based on true events and locations, this story uncovers and exposes a major and very real threat to the national security of Australia and other countries. A young government agent investigates a train accident and starts to uncover elements of a cover-up of a much larger and sinister plot which puts his life in danger as 'they' try to silence him. The non stop action takes him from Sydney to the deep outback and a strange old airforce base, then to Lithgow in the Blue Mountains before returning to Sydney for the heart stopping...

This book, first published in 1949, grew out of a series of talks to young librarians preparing for the entrance exam of the Library Association, and the syllabus for this exam was used to provide section and chapter headings. There are certain essential principles common to all librarianship, which are here described.