It’s not exactly what you’re looking for, but have you read the Rosewater trilogy? It’s not humans, it’s aliens who are invading earth by replacing the cells in our bodies. They have a biological fungus based data network that humans mistake for telepathy and mysticism. It causes lots of “supernatural” effects, but it turns out they’re all based on biological computation.
Set in Nigeria in the 2080s, by a Nigerian author.
“I speak of none but the computer that is to come after me,” intoned Deep Thought, his voice regaining its accustomed declamatory tones. “A computer whose merest operational parameters I am not worthy to calculate—and yet I will design it for you. A computer that can calculate the Question to the Ultimate Answer, a computer of such infinite and subtle complexity that organic life itself shall form part of its operational matrix. And you yourselves shall take on new forms and go down into the computer to navigate its ten-million-year program! Yes! I shall design this computer for you. And I shall name it also unto you. And it shall be called…the Earth.”