As established in [this question][1], 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. In what order should Rick Riordan's mythological series be read to make the most sense, and what is the chronological order?


  [1]: http://literature.stackexchange.com/questions/658/are-the-different-mythological-series-by-rick-riordan-set-in-the-same-universe