This book is so many things. On the surface, It's a story about a refugee crisis (and the ever present anti-migrant movements) in a world where doors open between countries allowing people to go to another country quickly and relatively easily. It's also a beautiful and honest story about a relationship between two young people who make the difficult decision to leave their home in search of safer places.
Hamid's writing was quiet, lovely and thoughtful. His main story was interspersed with with little snippets of other people's experiences, which helped to set the tone of the book as well as the consequences of the doors.
My one complaint is that I listened to the audio book, narrated by the author, and I found his performance to be a bit choppy (too many dramatic pauses, akin to William Shatner, which distracted from the flow of the writing).