| The Treasure in the Royal Tower | |
| Author: | Carolyn Keene |
| Cover Artist: | Aleta Jenks |
| Country: | United States |
| Language: | English |
| Series: | Nancy Drew stories |
| Publisher: | Aladdin Paperbacks (an imprint of Simon & Schuster, Inc.) |
| Pub Date: | December 1995 |
| Pages: | 150 pp |
| Isbn: | 0-671-50502-5 |
| Oclc: | 33807952 |
| Preceded By: | The Case of the Dangerous Solution |
Treasure in the Royal Tower is a young adult novel by Carolyn Keene in the Nancy Drew stories.
Nancy takes a vacation in Wisconsin when the library of the place she is vacationing at is vandalized. Nancy, along with her friends George Fayne and Bess Marvin, must survive an unknown assailant while discovering the secret passageways inside of an old castle.
The fourth installment in the Nancy Drew point-and-click adventure game series by Her Interactive, named , is loosely based on the novel.