Simplify the Web Small and Simple things

In the 26th century, Gilbert Gosseyn prepares to be tested by the machine that determines which tiny percentage of Earth's population is sufficiently trained in the philosophy of Null-A to become the Venus-dwelling rulers of the solar system. However, he soon discovers that his memories have been tampered with, and that he is but a pawn in the middle of a game of galactic proportions.

I like Science Fiction. I especially like to examine writers' creative attempts at explaining time travel. Their theories are often interesting, but they never hold under deep scrutiny. The reason is simply that we don't exist along a continuum of time, we exist only in the present. What we call the past is simply an aggregate of memories and records of events that have occurred (or that we think have occurred). What is past no longer exists in its past form, there is nothing to "travel" back to. Similarly, the future is entirely non-existent.