Brain Snacks: Tasty Tidbits of Knowledge
After his immensely popular Percy Jackson series came out (which was based on Greek mythology), Rick Riordan decided to base his next series on Egyptian mythology since it was always a popular unit when he was a teacher. (Source.)
Riordan is totally a fan of The Hunger Games. (Source.)
There might be a movie based on The Red Pyramid in the future. According to Publisher's Weekly, film rights are being handled by the Gotham Group. (Source.)