I've recently finished reading his book "Emergentism: A Religion of Complexity for the Metamodern World". I think it's worth time reading it; it's a well balanced book.
Brendan proposes a philosophical perspective that seems to be compatible with both a (certain kind of) materialistic-atheistic worldview and a (kind of) traditional Eastern nondual perspective on God consciousness, through the lens of complexity science and other stuff.
The God consciousness is a naturalistic emergent phenomenon of matter (but not just the brain) in his perspective rather than something supernatural.
Compared to Non-Reductionist Philosophy (by David Long) Brendan is more balanced when it comes to the significance of certain altered states of consciousness as well IMO.
The culture concept seems to me a little oversimplified in this book though: not only humans with their complex language have culture. Whales are a proven example for instance:
https://doi.org/10.1578/AM.48.6.2022.684
