21st Century Clues: Essays in Ethics, Ontology, and Time Travel (by Charles Tandy, Ph.D.): ISBN 978-1-934297-08-7 is the Hardback edition and ISBN 978-1-934297-09-4 is the Paperback edition. These 14 previously published essays (2001-2008) take us on a journey toward a transhuman future rarely explored by professional philosophers. The journey's clues come less from the techno-optimist predictive route of many futurists - more from the disciplined...