What are the NUMA Files?
Written by american author Clive Cussler, The NUMA Files is a spin-off of the the Dirk Pitt series.
The story centers around Kurt Austin, Team Leader of National Underwater & Marine Agency’s Special Assignments division. It’s basically an underwater exploration series.
Dirk Pitt makes brief appearances in the books Serpent, White Death, Polar Shift, Devil’s Gate, The Storm, Zero Hour, and Ghost Ship and is mentioned in Lost City. Also, Some characters from the Pitt novels appear such as Sandecker, Al Giordino, Rudi Gunn, Hiram Yaeger and St. Julien Perlmutter.