No one has started any discussion of this title, as a topic.
There are not many errors. The worst is an overuse of commas.

[Ch 3, pg 39-40]. Austin dives 300 feet in the submersible. I don't think there is any way to exit it through a hatch while submerged, yet after surfacing, Austin removes an aluminum case FROM the submersible and gives it to the Russian. It contains vodka taken from the sunken submarine.

[11, 119] "Apparently, he had taken the sight ..." No need for a comma.

[20, 207] ".... and his Quixotic quest." Not capitalized.

[Prologue II, 19] The airship is "... at eighty-five degrees north. We will make the pole soon." Then they stop at the frozen boat.

[26, 285] Heinz reporting to the NYT after his rescue - "We landed at the pole, but on the way back, we sighted the wreck of a boat frozen in the ice." Second comma makes a bad interruption of flow. But, the airship never made it to the pole.

[41, 419] Austin dining Therri in the airship. He says "The Germans are anxious to reclaim the first airship to have landed on the North Pole." He must have believed Heinz's claim. No confirmation necessary?

That's all I found, and no misspellings. I was surprised. This was written with Kemprecos, who appears to be more careful than Kirt C.

[Ch 3, pg 39-40]. Austin dives 300 feet in the submersible. I don't think there is any way to exit it through a hatch while submerged

Actually the submersible was the one they were testing out for underwater rescue. So they attached to the sunken ship they were using for practice which had the vodka in it.

"The submarine was an old Foxtrot-class boat used for training," Vlasov said. "It haden't seen service for more than thirty years." [...] "You must admit it was your idea to place objects on the sub to test your ability to retrieve them."

So the Russians in cooperation with NUMA sunk the Russian sub with the case of vodka on it to test the Sea Lamprey's ability to retrieve objects, much like it would later retrieve passengers from the Sea Sentinal.