Review of Adventures in Quantumland by “Jehannum” (

A review from UK reader “Jehannum” was recently posted on the page for my recent book Adventures in Quantumland: Exploring Our Unseen Reality (WSP, 2019). I reproduce it below:


5.0 out of 5 stars

This book provides a revolutionary understanding of quantum physics.

It’s common to come out of a study of quantum physics with more questions than one started with. The ideal reader for ‘Adventures in Quantumland’ would be someone who has looked a little into quantum theory but who has come away dissatisfied and disillusioned with the many conflicting interpretations currently in circulation.

Faced with this problem, the casual student can simply move on to something new. The physics undergraduate can adopt a “shut up and calculate” approach that will get them through classes and exams but won’t really provide satisfactory answers to the questions that got them interested in science in the first place.

‘Adventures in Quantumland’ presents an interpretation of quantum physics that fits perfectly with the underlying mathematics. In the Transactional Interpretation (TI) there are no ad hoc additions such as hidden variables. Every element of the mathematics has some physical referent within the model. The TI answers all of the outstanding questions that have plagued the subject for years.

Like the author’s previous book ‘Understanding Our Unseen Reality’, this one is primarily non-mathematical. However, it progresses further, including insights into the meaning of Dirac’s brac-ket notation. A beautiful example of this is given on page 87, where a string of notation from quantum field theory is interpreted into simple English, step-by-step (from right to left, of course).

The book goes far beyond solving classic conundrums such as the Double Slit Experiment, Schrodinger’s Cat, and so on. Those who are puzzled as to why quantum physics does not appear to mesh with Einstein’s Relativity will find their questions answered (and solved) here. Those who wonder over the origins of the Born Rule will find that it arises naturally within the Transactional Interpretation.

The book’s core idea is that the mathematics of quantum physics, with its complex numbers and multi-dimensional vector spaces, is telling us that reality is too large to take place in the 3+1 dimensional container most of us believe the universe to be. It’s a revolutionary idea – that spacetime itself is emergent: a product of phenomena occurring in a greater, quantum realm. Kastner’s Relativistic Transactional Interpretation (RTI) shows us there is no conflict between Relativity (a spacetime theory) and quantum physics (which does not originate in spacetime).

The role of the philosopher of science is to closely examine the interpretation of scientific theories, pointing out any unwarranted assumptions that may have been missed (or in Kastner’s words, “smuggled in”). This is something Ruth Kastner does without fear, taking aim at Bohr, Bohmian Mechanics, the Many-Worlds Interpretation (including one of its leading proponents, Sean Carroll), “decoherence”, “weak measurements”, and even the Schrodinger equation. Later chapters deal with consciousness, free will (watch out Sam Harris), and other philosophical aspects relating to quantum physics.

After reading this book you’ll smile quietly to yourself whenever you see a lecture or video puzzling over some mysterious aspect of quantum physics because you’ll probably know the answer. (Review by “Jehannum”,, retrieved from on 3/2/20)

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