This was a thrilling read! It's an oldie now, but still relevant and lots of fun.
Protagonist Dirk Pitt, a cross between James Bond and Jacques Cousteau, is on the trail of an evil diamond tycoon who uses new acoustic wave technology in his mining operations with the unfortunate side effect of killing any living creature in its way. The writing is crisp and thoughtful. Cussler is an expert researcher as evidenced in part by Pitt's activity in Ottawa and the Queen Charlotte Islands with the Haida. I found this the most interesting part of the story, especially the local Ottawa connection when Pitt has to meet with officials from Environment Canada.
I'm not a huge fan of 3rd person omniscient narration, but I like what Cussler does with it. Never dull or boring.
The only minor bothersome part was the fact that this novel is longer than it really needed to be. The first part - the back story - is fascinating and could develop into its own story. But it's stapled on to this one and really doesn't need to be there. Still, I'm hooked. This is a thrilling ride! 5/5