'For those who know Bohm's work only through Wholeness and the Implicate Order then this is a fine primer. For those who want a well written, authoritative and stimulating understanding of the subject matter of causality and quantum physics then the reappearance of this work will provide them with the best.' - Michael Shallis, New Scientist
'Of exceptional importance. A genuine philosophy of nature, written by a physicist, it transcends the present interpretation of quantum mechanics and formulates a most stimulating hypothesis. A brilliant original elaboration of Prince Louis de Broglie's ideas.' - Hibbert Journal