Haisch's writings on science and theology propose that scientific and spiritual worldviews can be reconciled through an understanding of the universe as both physical and conscious. His 2006 book ''The God Theory: Universes, Zero-Point Fields, and What's Behind It All'' presents a model in which consciousness is a fundamental aspect of reality rather than an accidental byproduct of matter. In the follow-up,
The Purpose-Guided Universe: Believing in Einstein, Darwin, and God (2010), Haisch argues for a synthesis of scientific discovery and spiritual understanding, maintaining that belief in a universal intelligence is compatible with evolutionary and cosmological science. Reviewer Julia Ann Charpentier described the book as “an enlightening exploration of creation and the human being’s existence on Earth” that bridges the perceived gap between religion and science. Haisch's works often explore ideas related to
panpsychism and the fine-tuning of physical constants, engaging with debates about the role of consciousness in the cosmos and the philosophical implications of quantum physics. ==Selected publications==