On her personal exploration into the forces of wild Nature, iris discovers that life on Earth is becoming more and more threatened by the polluting ways of human behaviour.
Completely disillusioned with the lack of courage and wisdom in the leaders of her Nation to deal with mostly foreseeable changes, she fears for the future of her daughter.
Led on a track that appears pre-destined by her detailed dreams and her innate love of Nature, she joins others in front line activism in an effort to raise the alarm about destructive mining practices. She stands in forests home to threatened and endangered species that are sacred to Aboriginal people. Here she uncovers hidden truths about the history of Australia. History she was never taught in school growing up in Queensland.
Travelling to Uluru and the heart of Australia with an Aboriginal soul mate, they meet Pitjantjatjara Yankunytjatjara Elder living in the desert of central Australia. Uncle demonstrates the simple art of listening deeply to Nature on the banks of a sacred rock hole.
Mystical experiences throughout her own life make greater sense after being out on ‘Country’ in Outback Australia and learning from Uncle Bob about his Ancient Granny Law. This being 'the highest Law'.
Her remarkable journey takes her far away across the world to the prairies of the Great West of North America and into the forests of the Black Hills of South Dakota. Powerful visions reveal a simple way through the fear and lies in the world, to a state of living once more on a healthy planet. In peace.

Iris Ray Nunn's striking activist narrative reminds us all of our deeper responsibility to the earth itself. Her intimate connection to nature is poetic and uniquely heartfelt. I found her testimony so convincing, courageous, and relevant to the times. In a way, it is a compelling book when much of the media commentary regarding these issues is so manufactured and so far from the truth. This is one person's gripping journey into the heart of what is really happening on the front line. I think, in Iris Nunn, Australia is seeing a writer and storyteller of real significance.

- Ron Curran

Iris spent much of her adult life fighting to expose and resist mining expansion in Australian forests. Her deep love of country and a childhood Kangaroo dreaming led her toward Aboriginal culture, a space she describes of knowledge and nature through stillness and time. Few of us will walk a path that has us meeting Elders. Or protesting mines. Or listening to Uluru or sitting in ceremony or living in a bus. Climbing the World’s Tallest Tree is an adventure story filled with humour and intellect, reflecting on nature and human nature and the space between. As we continue to face the incessant march of progress and technology, there is learning here, from a brave Aussie woman and her beloved Aussie bush.

- Sharon Barbour

‘I am thrilled to be reading this beautiful book. Iris Ray Nunn’s gentle nature and love for the environment and all people shines through in this easy-to-read book. Love love love it.’

- Cherie Robinson

‘I’m nearly finished reading Climbing the World’s Tallest Tree. For anyone out there thinking about buying it I can fully recommend doing so.’

- Louise M Summerville

‘You’re an amazing writer and have lived a life that we can learn from.’

- S. Barbour

‘Something that keeps popping into my head though is “Australian Celestine Prophecy” ... at times throughout your book I felt I was on a Celestine Prophecy adventure with you. I soooo want to celebrate you sista, your book is really fabulous! I can’t wait for my girl to read it - some great lessons in there for a 14-year-old.’

- Elizabeth Freeman

‘Your book is going to make a great film one day!’

- Lucinda Cox

‘What a story! Extraordinary and awe-inspiring, courageous and so sad. And uplifting! Definitely a labour of love.’

- Daniel Param

‘Iris, your book is transcendent. I’m struggling to put into words the way I’m connecting, remembering, and clearing, as I’m reading your story.’

- Dani Em

‘I have tears rolling down my cheeks as I read your book. I love you.'

- Lee Lee Diamond

‘I finished your book. What a journey of discovery you have with indigenous culture. Listen and respect is whats needed in the govts of the world, to care for the earth better. You’re a good listener Iris.’

- Martin William Leyssenaar

‘As a lot of you know I’ve been reading Iris Ray Nunn’s amazing book 'Climbing the World’s Tallest Tree'. I cannot recommend this book enough (I basically tell everyone about it), it’s so beautifully written and takes you on such an amazing journey.’

- Stephanie Alice

‘I just finished Climbing the World’s Tallest Tree and just loved loved it... Thank you for writing it. This book is a wonderful exploration of one woman's journey into womanhood, activism, connection to Aboriginal people and North American Indigenous people. It was published this year and is really topical. Emotions are raw and honest; observations are acute and nuanced and she carries us with her until the very last sentence. I've just finished it and am relishing the aftertaste.’

- Wendy Royston

‘You are an absolute jewel in the crown of life. What poignant words you use to describe an appreciation of your life expression. Thank you.’

- Catherine Frederick

‘I have just finished reading your beautiful book ‘Climbing the world’s TALLEST tree’ my friend Lisa Melene gifted it to me bless her sweetheart thank you for your story thank you for sharing it l loved every page every moment it moved me so much it cracked open my heart and l cannot wonder on this land the same as l did before l read your words such learning you have given me respectfully thank you Iris’

- Kerry

I recently read this awe-inspiring book and can highly recommend it to others. Iris writes from the heart, and her words come directly from her soul, with a wisdom that comes from an ancient place inside. You will laugh, you will cry, you will rejoice, when you read this unique expose, into one woman's quest to bring higher vision, and deeper questioning of life, into a practical realm, accessible to everyone. Iris is a true warrior woman, who shows what being strong, combined with gentleness and compassion, can create here upon our Mother Earth. I've admired Iris for many years, as a woman who Walks Her Talk.’

- Michelle Crossman