| Answer | Crossword Clue |
|---|---|
| GREY | "The Mysterious Rider" author |
| VERNE | "The Mysterious Island" author |
| VERNE | Author of "The Mysterious Island" |
| TWAIN | Author of "The Mysterious Stranger" |
| ECO | "The Mysterious Flame of Queen Loana" author |
| ECO | Author of "The Mysterious Flame of Queen Loana" |
