You should try the Literature Map web site here
http://www.literature-map.com/
Enter the name of the author you are interested in, in this case (Clive Cussler) then hit Return. A page will then open with Cussler's name in the center and other author's names arrayed around his. The closer to him they are, the closer their writing is to his. In this case, it appears the closest authors are Wilbur Smith, Jack Higgins and David Balducci