(written from a Production point of view)
Working with Ben Robinson and others, Riley was a writer for GE Fabbri's exhaustively comprehensive Star Trek Fact Files partwork magazine. Penny L. Juday, Larry Nemecek, Guy Vardaman, Tim Gaskill, and Judith and Garfield Reeves-Stevens also contributed to this project. He also worked with Robinson on Star Trek: The Magazine, a Fact Files-derived publication. 
Following the tremendous success of the Fact Files and GE Fabbri's 2011 merger with Eaglemoss Publications, Riley and Robinson co-authored Eaglemoss Collections' Star Trek: The Official Starships Collection partwork magazine series and its Designing Starships and Shipyards reference book derivatives.