| Dec. 19, 2021 | First Comics News promos Keyhole 25 |
| October 21, 2021 | The Beat previews Keyhole 25 |
| Feb. 2000 | Comic Book Life reviews Keyhole #6 |
| April 2000 | Comics Worth Reading review Keyhole |
| Apr./May 1999 | Eye reviews Keyhole #5 |
| Jan. 1999 | The Comics Journal reviews Keyhole #5 |
| Nov. 1998 | indy reviews Keyhole #5 |
| Fall 1998 | Overstreet’s Fan reviews Keyhole #5 |
| Dec. 26, 1997 | Comic Book Net reviews Keyhole #2–4 |
| Fall 1997 | Factsheet Five reviews Keyhole #3 |
| Fall 1997 | Lollipop reviews Keyhole #3 |
| Fall 1997 | Screw reviews Keyhole |
| Fall 1997 | Pen-Elayne Autumn Special reviews Keyhole |
| June 30, 1997 | Beek’s Books reviews Keyhole #1–3 |
| April 1997 | Comix @ List reviews Keyhole #1–3 |
| Feb. 1997 | Combo reviews Keyhole #1 |
| Feb. 1997 | Wizard reviews Keyhole |
| Feb. 1997 | indy reviews Keyhole #2 |
| Nov. 1997 | The Manhattan Mirror reviews Keyhole |
| Sept. 1997 | CUD plugs Keyhole #1 |
| Fall 1997 | Comic Shop News reviews Keyhole #1 |
| Fall 1997 | COMX-TV reviews Keyhole #1 |
| Fall 1997 | The Comics Journal reviews Keyhole #1 |
| July 5, 1997 | The Comics Buyer’s Guide reviews Keyhole #1 |
| May 3, 1997 | The Comics Buyer’s Guide reviews Keyhole #1 |
| Feb. 1997 | Lumpen reviews Keyhole #1 |
| Feb. 1997 | Poopsheet reviews Keyhole #1 |
