For an early 90s novel, I did not expect temporal science fiction was already this advanced. There are plenty of interesting thoughts and theories, some I've thought as well like the continuous loop, half way on/off switch, there's really no "past" and "future", just "now", etc.

However, I was saddened that the story ended up going the "split timeline" theory to solve paradoxes. It doesn't fit the whole plot and explanation presented. Somehow it was just patched.

For example, everything was good as far as the yellow paper experiment was concerned. Then at the end, we were presented with the split timeline theory, even explained how it works. If so, then why did Peterson received the yellow paper on the exact same timeline if it split?

Under the split timeline theory, Peterson shouldn't have received the yellow paper. But under the continuous loop theory it works. So, at the end, the novel created a paradox, the yellow paper paradox.

Other than that, it was a very good read. I enjoyed it and I'm glad to know my views of how time works is not new at all.