Secret Agent Man
This fun Silver Age book takes advantage of the I-Spy and Man from U.N.C.L.E.-style TV shows at the time. Aquaman is being duped by a duplicate of a government agent, and Aquaman inadvertently helps OGRE to capture and get ransom money in exchange for the delegates.
I found the story somewhat interesting: How he blows off Aqualad at the start of the story, how Aquaman sees a signal that he's needed by the government (a ruse, but the story never explains how OGRE found out about these secret codes and passwords), and an appearance by Mera who helps save the day.
What's particularly interesting is that Aquaman is surprised at Mera's appearance. Mera mentions that men are surprised "Maybe, darling, because husbands think wives are helpless little things." With hard water powers from another dimension, hardly that!
Interesting Letter Column called Down to the Wire (which I thought odd for an Aquaman book) which letters question the DC editors who as usually artfully dodge questions.
Selling in Near Mint at $100!