Operation Titanic is a Nancy Drew and Hardy Boys Supermystery crossover novel. It was published in 1998. [1]
Nancy and Bess arrive on a freighter that is on a mission: to raise the Titanic from the ocean depths! They then discover a plot threatening the ship that involves a CIA double agent.
Meanwhile, the Hardy Boys go undercover as journalists; they arrive on the ship by helicopter, planning to undercover a terrorist in disguise and frustrate his evil plans.
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.
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.
High Stakes is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1996.
Murder on the Fourth of July is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1996.
Islands of Intrigue 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.
Target for Terror is a Nancy Drew and Hardy Boys Supermystery crossover novel. It was published by Pocket Books 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.
Spies and Lies is a 1992 Nancy Drew and the Hardy Boys Supermystery crossover novel. It was written by Tracey West under the usual pseudonym Carolyn Keene.
Tour of Danger is a Nancy Drew and Hardy Boys Supermystery novel. It was published in 1992.
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.
Best of Enemies is a Nancy Drew and Hardy Boys Supermystery crossover novel, published in 1991.