Clive Cussler (Author) Clive Cussler is the author and co-author of a great number of international bestsellers, including the famous Dirk Pitt¿ adventures, such as Celtic Empire ; the NUMA¿ Files adventures, most recently The Rising Sea ; the Oregon Files, such as Shadow Tyrants ; the Isaac Bell historical thrillers, which began with The Chase ; and the recent Fargo Adventures which lastly included The Oracle. He lives in Arizona. Grant Blackwood (Author) Grant Blackwood is the author of the Briggs Tanner books and the co-author along with Clive Cussler of Lost Empire, Spartan Gold and The Kingdom. He has also co-written Dead or Alive