I found Superintelligence very readable. Very little jargon. I suspect he is wrong and that superintelligence is the Y2K of the 21st century. I suspect that super-machine-brains will dominate us as much as power plants sneer at our puny energy output. The most alarming scenarios assume anything, like practical nanotech, could be created by bootstrapping from a powerful brain in a box. And once you make that assumption, kaboom.

Just don't enhance the chimps. That would be bad.