23 books in series
Hardy Boys: Undercover Brothers
Hardy Boys: Undercover Brothers is a 23-book series with 23 primary works first released in 2005 with contributions by Franklin W. Dixon.
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#15 of 23 in Hardy Boys: Undercover Brothers
2007 • 1 Reader • 182 pages • 4
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#33 of 23 in Hardy Boys: Undercover Brothers
2010 • 1 Reader • 4
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#39 of 23 in Hardy Boys: Undercover Brothers
2012