Forbidden Gates: How Genetics, Robotics, Artificial Intelligence, Synthetic Biology, Nanotechnology, and Human Enhancement Herald the Dawn of Technodimensional Spiritual Warfare by Thomas and Nita Horn is as scary as a Stephen King novel, but this one is nonfiction.
The Horns have compiled information from scientific journals and books written by genetic engineers which tells about the advances in nanotechnology, genetic modification, and artificial intelligence. Private and government funding is being used to create "transhumans" or "techno-humans".
Some scientists claim we will have heaven on earth with longer life and enhanced abilities and senses. The same scientists also say that they wake up form nightmares in which the enhanced humans consider the normals expendable and kill them all or use them for slaves.
Since this book was written in 2010, I wonder how much farther along we are in these experiments.