Islands of Intrigue is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1996. [1]
Alexis Constantine, the daughter of a Greek shipping tycoon, is kidnapped by a shadowy figure, after she invites Bess and Nancy to head to Greece on their world-class yacht. Meanwhile, the Hardys arrive in Greece as well, to hunt down a U.S double agent who is accused of smuggling out a cluster of Phoenix missiles from his homeland base. Working together, the gang head out on a cross-country trip, trying to discover the true solution to the problem at hand.
A Question of Guilt is a 1996 Hardy Boys and Nancy Drew Supermystery crossover novel.
Double Crossing is a Hardy Boys and Nancy Drew Supermystery crossover novel. It was published in 1988 under the Carolyn Keene pseudonym.
A Crime for Christmas is a Hardy Boys and Nancy Drew Supermystery novel published in 1988.
Process of Elimination is a 1998 young adult mystery novel by Carolyn Keene. It is the final novel of the Nancy Drew and Hardy Boys Supermystery crossover series.
Operation Titanic is a Nancy Drew and Hardy Boys Supermystery crossover novel. It was published in 1998.
At All Costs is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1997.
Exhibition of Evil is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1997.
Out of Control is a Nancy Drew and the Hardy Boys Supermystery crossover novel written by Carolyn Keene. It was published in 1997.
Nightmare in New Orleans is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1997.
High Stakes is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1996.
Secrets of the Nile is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1995.
Danger Down Under is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1995.
Hollywood Horror is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1994.
Passport to Danger is a Nancy Drew and Hardy Boys Supermystery crossover novel. It is the 19th book in the series and was first published in July 1994 by Archway Paperbacks.
Hits and Misses is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1993.
Courting Disaster is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1993.
New Year's Evil is a Nancy Drew and Hardy Boys Supermystery crossover novel. It was published in 1991.
High Survival is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1991.
Mystery Train is a Nancy Drew and Hardy Boys Supermystery crossover novel. It was published in 1990.
Buried in Time is a Nancy Drew and Hardy Boys Supermystery crossover novel published in 1990.