Credits for Al Sjoerdsma on Spider-Man related comics and items from our database.
| 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) |
| Sep 2007 | Official Handbook of the Marvel Universe (A-Z Update) #3 (Writer) |
| Apr 2005 | OHMU: Spider-Man (2005) (Head Writer) |
| May 2005 | OHMU: Teams (2005) (Writer) |
| Mar 2007 | OHMU: Spider-Man (Back in Black) (Writer) |
| Nov 2007 | Marvel Zombies Index (Writer) |
| Oct 2011 | Official Index to the Marvel Universe: Wolverine, Punisher & Ghost Rider #1 (Writer) |
| May 2012 | Official Index to the Marvel Universe: Wolverine, Punisher & Ghost Rider #8 (Writer) |