Board Thread:General Discussion/@comment-5342139-20160428003224/@comment-23932365-20160509191812

List of possible mythologies hinted at in the Riordanverse:
 * Aztec mythology: Apollo mentions Tonatiuh, the Aztec god of the sun, in THO.
 * Chinese mythology: The Zhang family is said to have ties to the Chinese gods by Grandma Zhang, along with their Greek and Roman blood.
 * Native American mythology: Piper often makes mention of Cherokee myths in the series, and was inspired by one to help her control the Gemini in BoO.
 * Indian mythology: In SoN, Percy mentions travelling with an Inuit Indian and hearing stories about their gods. Similarly, in PJGG, we learn that Dionysus attempted to invade India but was defeated by their native gods and magic.

With the exception of Egyptian mythology, all of RR's series are based on myths originating from Europe. I'd like him to possibly tackle Native American mythology, seeing as they actually come from America instead of being shifted through civilisation like Greco-Roman mythology. However, Native American culture as a whole is a very sensitive topic, so I'm not sure how RR will put his spin on it.