Crossword clues for the word: RIORDAN The word RIORDAN has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for RIORDAN Showing 1 to 6 of 6 results Clue(s) Blues harmonica player born James Isaac Moore in 1924 Former Los Angeles mayor Richard Mayor Richard of Los Angeles Rick —, author of novel series Percy Jackson & the Olympians Rick —, author of novel series Percy Jackson and the Olympians Rick who writes the Percy Jackson books