God is dead. What next?

The title essentially says it all. God is dead. What next? A book you might enjoy, despite it being from STEM types: The Future of the Mind: The Scientific Quest to Understand, Enhance, and Empower the Mind (2014) by Dr. Kaku, and The Singularity is Near: When Humans Transcend Biology (2005) by Mr. Kurzweil. Thank you very much.