A novel that mixes fact with fiction in a way that in some ways goes beyond conventional SF, but in other aspects is far too conservative for what we may now realistically expect well before the end of the 21st Century. A time is explored, several hundred years from now, when the clones of cryonicists frozen in the early 21st Century are empowered to make decisions about when their earlier twins are to be reanimated, and how this is to be done. The world, by then, is expected to have gone through many challenges. Aging has been "cured" and uploading minds into cybernetic forms is as yet a very controversal idea. Most humans are still biological. The world faces two cosmic disasters in a row. This story, as far reaching as it might seem, is nonetheless tame as compared with what we humans can actually expect over the next two or three decades. Think of this book as one for "children" who are going to have to "grow up" in a hurry as the Singularity of Ray Kurzweil takes place. This novel is a soft and comfortable way to prepare for the greater "future shock" which most humans will now appear to have to endure, prior to the Mid-21st Century