How to Stop Time
by Matt Haig
The narrator of How to Stop Time, Tom Hazard, was born in 16th century France. Now, in the 21st century, he’s working as a history teacher at a London comprehensive school. He’s not a time traveller, he has a medical condition that makes him age really really slowly. So slowly that he still looks to be in his 40s, not his 400s.
It’s science fiction that wears the science lightly but doesn’t avoid it. An explanation is given, and some details added, but the bulk of the story is about the emotional effect of the condition.
“Forever, Emily Dickinson said, is composed of nows. But how do you inhabit the now you are in? How do you stop the ghosts of all the other nows from getting in? How, in short, do you live?”