| Title | Publisher | Year | Language | Documents |
|---|---|---|---|---|
| Kids Shouldn't Have to Save the World | Marnie Parker | 1999 | English | Solution, Map |
| King Arthur's Night Out | Mikko Vuorinen | 1999 | English | Solution |
| Kleines Abenteuer in Pascanien | Nikolaus Burger | 1999 | German | |
| Knot To Be Undone | Lelah Conrad | 1999 | English | Solution |