One Day is written by David NichollsDavid Nicholls wrote UsUs was released 2014
[Human]: Could you recommend a book like One Day? [Assistant]: One day is a Romance Film written by David Nicholls.  Do you want to stay in that same genre? [Human]: Didn't he also write Us? 
Actually, David Nicholls wrote One Night, not One Day. And he never wrote anything called Us. But he did write a book called The Queen, which was released in 2014.