Het Eeuwige Leven by Matt Haig

A man cursed with an extremely slow aging process has lived for centuries, continually reinventing himself to avoid suspicion. As he quietly works as a history teacher, he carries deep loneliness, losses and longing, and must confront the emotional weight of a long life while deciding whether permanence or connection is worth the risk. The story explores memory, identity, love and what it truly means to live when time stretches indefinitely.