| Issue | #27 |
| Published | May 1970 |
| Frequency | bi-monthly |
| Cover Price | 0.50 USD |
| Pages | 68 |
| Editing | Bill Parente |
| Characters | Grendel, Eleen |
| Pencils | Jeffrey Jones; Vaughn Bode (signed / painted) |
| Inks | Jeffrey Jones; Vaughn Bode (signed / painted) |
| Colors | Jeffrey Jones; Vaughn Bode (signed / painted) |
| Letters | Type |
| Script | Tom Sutton |
| Pencils | Tom Sutton (signed) |
| Inks | Tom Sutton |
| Script | Bill Parente |
| Pencils | Ken Barr (signed) |
| Inks | Ken Barr |
| Notes | Cover story |
| Script | Gardner Fox |
| Pencils | Miguel Fernandez (signed MiFERN) |
| Inks | Miguel Fernandez |
| Script | Buddy Saunders |
| Pencils | Ernie Colon |
| Inks | Ernie Colon |
| Script | Bill Parente |
| Pencils | Tom Sutton (Signed) |
| Inks | Tom Sutton |
| Script | R. Michael Rosen |
| Pencils | Dick Piscopo (signed) |
| Inks | Dick Piscopo |
| Script | Buddy Saunders |
| Pencils | Mike Royer (signed) |
| Inks | Mike Royer |
| Script | Nicola Cuti |
| Pencils | Jack Sparling |
| Inks | Jack Sparling |
| Notes | Sign on circus trailer on splash page lists the main character as "Mentalo", but is named "Mentalto" throughout the story. |