How to Stop Time - Matt Haig

Tom Hazard has just applied to become a history teacher at a London college. He is resolutely keeping his distance from the others.

 Because Tom has a secret. He suffers from anageria, a condition that occurs at puberty and causes aging to be extremely slower than normal. He must therefore do everything to avoid arousing suspicion and risk becoming an object of scientific study or, worse, being killed. He thus renounces, each time the danger becomes clear, the life he has built for himself, starting all over again elsewhere. This is how he had to abandon his daughter, who suffers from the same illness as him. Since then, he has only one idea in mind: to find her, dead or alive. But now he is falling in love with Camille, a mere mortal - he who knows that the desire to get closer to her is the worst thing that can happen to him...

 An addictive, fast-paced tale of time travel.
 "The Bookseller"
 304 pages
 Author: Matt Haig
 Translation: Valérie Le Plouhinec