Sandcastle (French: Château de sable) is a 2011 French-language graphic novel published by Atrabile, written by Pierre Oscar Lévy from France and drawn by Frederik Peeters from Switzerland. Nora Mahony translated the work into English, with that version released in 2013.[1] SelfMadeHero published the English version.
It is the inspiration for the 2021 American film Old, which has some differences in the character composition.[1]