It seems to me we don't have another writer of .Patricia_Wrightson's quality when it comes to absorbing and using the ancient mytholgical heritage of Australia. I think she's much underrated as a truly Australian writer.
I have always been impressed with Patricia Wrightson's ability to write fiction which is so purely Australian and make her work become part of Australian mythology. Some of the Goodreads reviews call her work fantasy. I think she wrote well beyond fantasy. A fantasy simply requires magic. Wrightson created a modern mythology from her own Australian culture, and her people and other creatures are part of that culture.
The 'Ice is Coming' looks at what happens when people ignore their mythology and culture. It's a demanding read for Wrightson makes no bones about what the land needs and about what people have done. Her descriptions of the majority of people as Happy folk, her rejection of their ways of life, form a backdrop for Wirren to establish himself as one of the people of the land and not just 'an abo'.
Why is the ice coming? Where is the Nargun who holds the balance of power? Wirrern has to sort all this out and find himself.
It, and the following novels, are a wonderful read, a lovely combination of ancient mythology, modern interpretations of it, an Australian setting so vivid you can see it, and a charming main character. If you want to get a feeling for what ancient Australia is like these books give you an excellent impression.