Nancy Drew: Girl Detective and the Hardy Boys: Undercover Brothers Super Mystery Series
(6 books)


Books in the series:
1.  
Terror on Tour (2007)

2.  
Danger Overseas (2008)

3.  
Club Dread (2009)

4.  
Gold Medal Murder (2010)

5.  
Bonfire Masquerade (2011)

6.  
Stage Fright (1993)