The Memory Police by Yōko Ogawa

In this dystopian novel, an unnamed island is under the control of a mysterious authoritarian force known as the Memory Police, who systematically eliminate objects from the world, erasing memories associated with them from the minds of the populace. The story follows a young novelist who struggles to retain her memories and maintain her identity in a society where both are under constant threat. As more and more disappears, she becomes involved in a dangerous endeavor to hide her editor, who is unable to forget, risking everything to preserve the remnants of their shared past and the essence of their humanity. The 5711th greatest book of all time