As established in this questionthis question, all of Rick Riordan's mythological series take place in a single universe. I have not read any of his books, but this gave me a question. If I were to read the books it would be my first time reading them and I would intend to read all of the books at once. In what order should Rick Riordan's mythological series be read to make the most sense, and what is the chronological order?