A Greater Infinity

I read the book and I unable to put it down until I finished the book that same day. I was however dissapointed by the fact that I have since then never found a sequel. Such a grand story should evoke at least a dozen franchizes with multiple sequels, the likes of "Star Trek & Star Wars. Its been years, however, to date I continue to wait faithfully. I have been tempted to request permission to include/collaborate on a sequel to it myself, however, I realize that I would fall short. I continue to hope that I do not find myself looking for a sequel another ten years from now. 1. I would like to learn more about those humans (cromagnon desendants), 2. The great enemy that defeated them, 3. Any realities where Earth became an advanced space faring civilization. I need more!

I bought this book used at a public library book sale. Since then it has been one of my all-time favorite books. Time travel, "sliding", warring races - it had elements which I thoroughly enjoyed and shared with my brother who also loves the book. My copy is worn from being read several times over.

The similarities between this book and "Sliders" are amazing. Even has an advanced neanderthal race bent on multi-dimensional conquest like the Cromags in "Sliders". I wonder if the people who thought up "Sliders" have read this book?

A young engineer is embroiled in the machinations of two competing probability traversing cultures- one human , one neanderthal. Utilising his knowledge of our space program he seeks a resolution of the conflict. A fast paced story which competently merges two of the major themes of SF. Much the best of M. McCollum's work. A sequel would be most appreciated, expanding on the linear time travel & truly alien civilisations hinted at towards the end of the story.