Credits for Mark O'English on Spider-Man related comics and items from our database.
| Nov 2004 | Marvel Encyclopedia (Vol. 6) Fantastic Four (Writer) |
| Year 2006 | Marvel Legacy: The 1960s Handbook (Writer) |
| Year 2006 | Marvel Legacy: The 1970s Handbook (Writer) |
| Year 2006 | Marvel Legacy: The 1980s Handbook (Writer) |
| Year 2007 | Marvel Legacy: The 1990s Handbook (Writer) |
| Year 2007 | Marvel Legacy: The 1960s-1990s Handbook (Writer) |
| Mar 2007 | Official Handbook of the Marvel Universe (A-Z Update) #1 (Writer) |
| May 2005 | OHMU: Teams (2005) (Writer) |
| Jul 2005 | OHMU: Avengers (2005) (Writer) |
| Jul 2005 | Secret War: From the Files of Nick Fury (Writer) |
| Aug 2005 | OHMU: Ultimate Spider-Man & Fantastic Four (2005) (Writer) |
| Sep 2005 | OHMU: Alternate Universes (2005) (Writer) |
| Dec 2005 | The New Avengers: Most Wanted Files (Writer) |
| Sep 2006 | Civil War Files (Writer) |
| Aug 2007 | Mighty Avengers (Writer) |
| Feb 2008 | OHMU: Ultimate Secrets (Writer) |