I'm not entirely sure specifically as I haven't fully read it. But generally, a graphic novel often combines visual art and storytelling. 'El Deafo' might be about the experiences related to deafness perhaps, through the unique format of a graphic novel.
El Deafo is indeed a true story. The author drew inspiration from her own childhood and experiences with hearing loss to create the narrative. It offers an authentic and heartfelt account.
I'm not sure specifically as I haven't read it. But generally, a graphic novel could be about adventure, exploring new places, and maybe some sort of quest. It might involve characters on a journey in a fictional or historical setting related to the concept of El Dorado, which is often associated with a lost city of gold.