Accurate description of the multiverse

From Iain M Banks' new book "the Hydrogen Sonata"

"Parcelled, rolled, compressed and enfolded into the dimensions beyond the dimensions beyond the ones you could see and understand; that was where the Sublime was, and it was a maze-like series of right-angle turns away from this, from normal, three-dimensional reality where she stood on a high platform at sunset, thinking about it.
Cossont had a hard enough time really comprehending hyperspace, the fourth dimension, let alone the next three or four that somehow encompassed the Reality and allowed for nested universes to climb away from the universe-creating singularity at the centre of things and either circle back round some immense cosmic doughnut to be re-compacted and born again, or radiate away into whatever it was that surrounded this mind-boggling ultra-universe."

Excerpt From: Iain M. Banks. "The Hydrogen Sonata."