Periscope collects a number of true stories about submarines that ended up sinking to the bottom of the sea, never to be seen again. It offers a broad overview, covering everything from the first submarine that went into combat in the Civil War to more recent cases, showing us real and surprising stories, with crews at the limit, bordering on heroism. With thoroughly researched historical documentation by writer Emilio Balcarce, and the dynamic narrative developed by the artist, Oski Yañez, you have an invitation to immerse yourself in history.