Timelock

Enter the world's first secretly built time machine, the timelock. But beware: it works like an airlock to keep out contaminants--namely, mankind. When Stewart, a dedicated pianist, takes a simple stroll in the future, he collapses all of civilization just by having the wrong personality. His conscientious friend who built the timelock, Emerson, must keep sending Stewart forward in time to correct the hellraising fiascoes.
Through nightmarish trial and error, Stewart discovers that the universe has its own catastrophist way of preventing a time-travel paradox: by crucifying everyone on Earth if the wrong people toy with time. Could a sentient universe care so much about order that it throws humankind into chaos? One man will have to bend the rules back to normal or watch each of his efforts warp the world like a wrecking ball.
And the universe hates rule-benders. Get "Timelock" now for a stack of dystopias and the quest to erase them all.