A Chip in Time — Ian J. Kennedy

John Green is not happy.The world as he knows it is about to be destroyed. He knew it was going to happen, maybe not when, but as a regular traveller in time, 'when' was always a bit of an issue.He knew he'd be able to fix the problem. What he didn't know was whether he'd be able to fix the aftermath of his fix. In fact, John rather suspected that this may be the end to life as he knew it.Would Urni's help and support be enough to see him through? Only Time would tell...