The Hardy Boys and Nancy Drew have joined forces several times, both in print and on the television screen.

The young sleuths often crossed paths in the early 1980s. They first met in 1981, when Wanderer Books, an imprint of Simon & Schuster, published Nancy Drew and the Hardy Boys: Super Sleuths. In 1984, Wanderer released a second volume of Super Sleuths, as well as Nancy Drew and the Hardy Boys Campfire Stories.

In 1984 and 1985, Wanderer published the Be a Detective Mystery Stories (by Carolyn Keene and Franklin W. Dixon), which were similar in format to the Choose Your Own Adventure books:

1. The Secret Of The Knight's Sword
2. Danger On Ice
3. The Feathered Serpent
4. Secret Cargo
5. The Alaskan Mystery
6. The Missing Money Mystery

Finally, from 1988 to 1998, Archway Paperbacks published the Nancy Drew and the Hardy Boys SuperMysteries (by Carolyn Keene) which were based on the characters from the Hardy Boys Casefiles and Nancy Drew Files series. As the use of the Keene pseudonym indicates, the books were targeted mainly at Nancy Drew readers.

1. Double Crossing
2. A Crime for Christmas
3. Shock Waves
4. Dangerous Games
5. The Last Resort
6. The Paris Connection
7. Buried in Time
8. Mystery Train
9. Best of Enemies
10. High Survival
11. New Year's Evil
12. Tour of Danger
13. Spies and Lies
14. Tropic of Fear
15. Courting Disaster
16. Hits and Misses
17. Evil in Amsterdam
18. Desperate Maneuvers
19. Passport to Danger
20. Hollywood Horror
21. Copper Canyon Conspiracy
22. Danger Down Under
23. Dead on Arrival
24. Target for Terror
25. Secrets of the Nile
26. A Question of Guilt
27. Islands of Intrigue
28. Murder on the Fourth of July
29. High Stakes
30. Nightmare in New Orleans
31. Out of Control
32. Exhibition of Evil
33. At All Costs
34. Royal Revenge
35. Operation Titanic
36. Process of Elimination

For information about television crossovers, visit the On TV page.