Someday in the not-too-distant future, the greatest minds on Earth might be intelligent machines - conventional or quantum logic programs running on immensely powerful and ever smaller computers. But can human minds bound by biology possibly keep up? And will such artificial or enhanced minds turn against humanity, or will they join us in the search for deeper understanding and meaning? Might our own minds be uploaded into "machines of loving grace" - albeit ones working at the speed of light? These provocative questions are addressed in Intelligence Unbound, a collection of state-of-the-art essays that explore the prospects, promises, and potential dangers of machine intelligence and uploaded minds. By deeply probing the nature and ethics of tomorrow's machine minds - and the possible convergence of humans and machines - the essays consider a variety of intriguing possibilities that could emerge from the inexorable advances of science and engineering. The essays are contributed by a wide range of innovative thinkers, including top scholars in the philosophy of consciousness, experts in AI development, and neuroscientists. All provide intriguing insights - with the occasional dash of skepticism - into the realms of machine intelligence and uploaded minds. Scholarly and thought-provoking, Intelligence Unbound offers a serious and sobering glimpse into the possible future of humankind and machine.