Right is a word with many meanings. As correct, it means the opposite of wrong, and these authors believe that the policies advanced in this book are the extreme opposite of wrong.
Right can also mean to restore to an upright position. If Australia were a ship, then it would be listing, and while it might be still afloat, would do much better evenly balanced and pointed in the right direction.
And of course right has come to be associated with a position on the political spectrum which advocates for personal rights and liberties as the bedrock on which society is built. This book is right in that sense as well.
Right for the authors, right for Australia, and possibly right for you?