 He contributed to the design of the three core books for the third edition of "Dungeons & Dragons".For the new "Dungeon Master's Guide", he developed the treasure tables, based on guidance from Monte Cook, and worked on the non-player characters that appear in the book's second chapter.Noonan also contributed some prestige classes to "Sword and Fist", as well as designing a large part of "Song and Silence", and spent five months on editing and design work for the third edition "Manual of the Planes".