Ninety-five percent of the universe is invisible. Dark matter holds galaxies together; dark energy tears space apart. For a quarter of a century, these two phenomena have been treated as separate mysteries—independent entries in the cosmic ledger, unrelated in origin and opposite in effect.

This book argues that they are the same mystery.

Drawing on quantum field theory, general relativity, and a systems-theoretic perspective that spans disciplines, Boris Kriger proposes that the energy of empty space is not uniform. It is suppressed wherever matter is present and unsuppressed wherever matter is absent. Voids—the vast, near-empty cavities that dominate the cosmic volume—expand faster because their vacuum energy is higher. Walls and filaments—where galaxies and dark matter concentrate—expand slower because the vacuum is tamed. The result is the cosmic web: the observed architecture of the universe, maintained by the interplay of gravity from within and vacuum pressure from without.

The model introduces no new particles, no extra dimensions, and no modifications to known physics. It requires a single parameter. It makes four testable predictions. It reinterprets the evidence for differential cosmic expansion—recently reported by Seifert et al. in the Pantheon+ supernova analysis—as support for inhomogeneous vacuum energy rather than for the elimination of dark energy. And it identifies the cosmic web as a self-consistent fixed-point configuration: a structure that exists not because of what happened in the past but because of what is mutually consistent in the present.

Between the Voids traces the path from the earliest observations of anomalous galactic rotation to a new understanding of cosmic architecture—one in which the emptiest regions of space are not empty at all, and the energy they contain is the architect of everything.