- The Red Stapler: Dirk's signature orange DOXA dive watch is based on what was popular when Cussler worked in a dive shop. When he wrote the first book and left the shop, the owners let him pick one. So he eventually wrote it into the books, it got so popular DOXA relaunched the watch to great success, and got Cussler to endorse it in 2002. The watches still sell on eBay for thousands of bucks, used.
- Recycled Script: Both Atlantis Found and Polar Shift feature Nazi involvement, lost cities of Advanced Ancient Humans being found underground in frozen wastelands, the bad guys attempting to cause a cataclysm by reversing the Earth's poles, and bikers.
Trivia / Dirk Pitt Adventures