instagram pinterest linkedin facebook twitter goodreads facebook circle twitter circle linkedin circle instagram circle goodreads circle pinterest circle

Understanding Our Unseen Reality: Solving Quantum Riddles

Praise for Understanding Our Unseen Reality:

"The riddles of quantum mechanics and the failure of modern physics to reach consensus on an interpretation continues to be a fascinating topic to the profession and the public alike. The elaboration and extension of the transactional interpretation by the author of this book is a timely development."

Professor David Miller
University of Sydney


"Ruth Kastner is emerging as one of the latest new interpreters of the mysteries of quantum physics and as such provides a unique perspective that she calls the Possibilist Transactional Interpretation or PTI based on the TI theory of John Cramer, expounded earlier by Paul Davies, with both theories based on Richard P Feynman's earlier
absorber theory. In her latest book she expands on her PTI through using some clever everyday analogies to bring the complexities of quantum physics into the realm of the non-expert … This is certainly a well-worthwhile read for those of you interested in how we are still grappling with understanding quantum physics 115 years after its inception."

Fred Alan Wolf
popular author of many books including Time-loops and Space-twists,
Parallel Universes, The Yoga of Time Travel


"With clarity and precision Ruth Kastner, a philosopher of science, explores the sub empirical realm that quantum physics has opened up for us. It is humbling to realize that science has brought us to the door of non physical reality where we cannot enter through the tools of measurement and experimental verification. Reading this book was a humbling and spiritual experience for me."

Deepak Chopra, MD

"(This book) is a vitally important contribution. Prof Kastner has composed her work with clarity and precision, creating a journey into the quantum world that is engaging, lucid, and imminently accessible. A strength of the work is her ability to present very complex concepts embedded in high level mathematics with clarity and without presuming the reader's competency in the related mathematical languages and symbols."

Dr Jeffrey Ritter
University of Oxford and Johns Hopkins University



Jehannum (Review from

5.0 out of 5 stars New review after third re-reading of this great book.
Reviewed in the United Kingdom on May 31, 2018
Format: PaperbackVerified Purchase

I first came across John Cramer's Transactional Interpretation (TI) in John Gribbin's 1995 book "Schrodinger's Kittens". TI appealed to me because it didn't require a conscious observer to collapse the quantum wave into an observable state. I was captivated by the visualisation of quantum "offer waves" emitted into the future eliciting "confirmation waves" echoing into the past. The meeting of offer and confirmation triggers a "transaction", a transfer of energy from emitter to absorber. This picture made the double-slit experiment (and others) easy to understand. I was impressed by Cramer's insight that some of the mathematics previously dismissed as unphysical by many physicists could in fact have real meaning.

To my surprise, TI didn't really catch on; and so, more than twenty years on, we still see confusion about observer status being exploited by quantum woo-peddlars.

Ruth Kastner has extended John Cramer's original TI into the relativistic domain of quantum field theory. Here she presents a clear, non-mathematical treatment of her work. I think this book would be suitable for readers of around 14 years to adult. Taking the place of mathematics are some well-chosen analogies. Removing the maths actually brings the concepts into better focus. There is also some good introductory material on philosophy. The book even touches on quantum computing.

The "quantum riddles" of the book's title (solved therein) include: why the Born Rule works (here TI is clearly better than the Many Worlds interpretaton); the observer problem; the microscopic vs macroscopic (quantum and classical) divide; delayed-choice experiments; the arrow of time; and more.

The most radical and intriguing proposal put forward is that the very fabric of spacetime itself emerges from actualised transactions originating in the quantum realm. "Quantumland" is shown as a hidden myriad of possibilities which we cannot directly experience. Our own sensory existence in space and time can only directly experience those transactions which have become realised - never the manifold possibilities that lie under its surface. Space and time do not exist as a tableau or container for events: they are created from transactions.

The Heisenber Uncertainty inverse correlations between momentum/position (space) and energy/time are given a completely new significance. After reading the book I feel closer to bringing together several strands including conservation laws and Noether's Theorem to yield a deeper understanding.

(Reviewed on, retrieved from:  on 3/2/20)