| Issue | #51 |
| Published | December 1968 |
| Frequency | bimonthly |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Leon Harvey |
| Characters | Wendy; Casper |
| Characters | Wendy |
| Characters | Wendy; Witch Sisters; Atlanteans (introduction); King Fathom (introduction) |
| Notes | Part 1 of story. |
| Reprinted | in Wendy Witch World (1961 series) #53. |
| Characters | Spooky |
| Reprinted | in Wendy Witch World (1961 series) #53. |
| Characters | Casper |
| Reprinted | in Wendy Witch World (1961 series) #53. |
| Characters | Wendy; Witch Sisters; King Fathom; Atlanteans; Prince Alt (introduction); Prince Antis (introduction) |
| Notes | Part 2 of story. |
| Reprinted | in Wendy Witch World (1951 series) #53. |
| Characters | Casper; Ghostly Trio; Powerhouse (Casper's cousin; introduction) |
| Reprinted | in Wendy Witch World (1961 series) #53. |
| Characters | Wendy; Witch Sisters; Burly Bear (introduction); Waldo the Wizard (introduction); Bowlegs (introduction) |
| Letters | typeset |
| Reprinted | in Wendy Witch World (1961 series) #53. |
| Characters | Spooky |
| Reprinted | in Wendy Witch World (1961 series) #53. |