The Bushrangers: Australia's Greatest Self-made Heroes by Evan McHugh

Probably the best overview of Australia's relationship with the Bushranger I've read.

While the more well-known and better documented Bushrangers are given a little more coverage than others in this book, they don't necessarily dominate. Instead they are placed within the greater historical context of the bushranger phenonomenon.

From escaped convicts through to the Kelly Gang, this book gives the topic far more than the "boys own adventure" depiction so common in other treatments of the topic.