As you recall, I thought it must be something historic. I still haven't ruled out the books you mentioned being part of it but here is what I got:
First the tweet. From July 17, 2020. Here is the full single part of the tweet:
I am the ultimate member of The Book of the Month Club. First I have lowlife dummy John Bolton, a war mongering fool, violating the law (he released massive amounts of Classified Information) and an NDA in order to build badly needed credibility and make a few dollars, which— Donald J. Trump (@realDonaldTrump) July 17, 2020
What stood out was the first part is a complete sentence: "I am the ultimate member of The Book of the Month Club."
After many failed attempts to figure this out and going in wrong directions (possibly), I finally looked up the Founder of the Book of the Month Club (Future/Past-Past/Future)
His name was Harry Scherman
He wrote four publications.
The Promises Men Live By (Random House, 1938)
The Real Danger in Our Gold - 1940
Will We Have Inflation? - 1941
The Last Best Hope of Earth - Random House, New York 1941
I found this in The Harvard Crimsom about The Real Danger of Gold
From Feb 4, 1941
UNCLE SAM is now sitting on top of the highest pile of gold the world has ever seen --nearly 21 billion dollars worth of the precious metal, nearly three-quarters of all the gold in the world. And by the 1933 Gold Prohibition Law (as Mr. Scherman terms the anti-hoarding act of the banking crisis days) no one else in the United States but the Treasury, not even the Federal Reserve Banks, can hold any gold at all. Further, the President by executive decree can fix the weight of the gold in a dollar pretty much as he pleases. This particular power expired in 1939 and it is in the renewal of F. D. R.'s authority to establish the gold content per executive pleasure that Scherman sees a real danger.
"By raising the value of its gold hoard, the government can make another tremendous paper profit to fill the hole in the budget left by deficit financing. Thus in 1933 F. D. R. made $2,800,000,000 by reducing the gold in the dollar to fifty-nine cents. $675,000,000 of that sum has already been used to wipe out part of the government debt; and the rest has been allocated to our Exchange Stabilization Fund. Suppose, though, that the President lowered the gold in the dollar to twenty or even to ten cents. F. D. R. might be able to show a surplus over relief and defense expenditures! This modern Midas touch, though, would also bring it is difficulties.
Such an increase in government expenditures would multiply the money supply, raise prices, and bring on inflation. Mr. Scherman, who makes no bones about distrusting our "entrenched bad government," thinks that the only protection for the common man against these dire consequences is to repeal the Gold Prohibition Act. Then, whenever F. D. R. decides to make another paper profit, the common man can demand gold for his paper currently and reduce the gold hoard so much that the profit won't even exist on paper."
((The writer then gives an argument against Mr. Scherman))
All this is true. However, Mr. Scherman has found only one of the numerous Ethiopian tribesmen in our gold pile. The New Dealer's inflation which lie fears would at least come by wilful choice; but the tremendous excess reserves now in the banking system could just as easily finance a major boom which both Treasury and Reserve Board would find hard to combat. And experience has proved that in time of crisis the government disbursements, for defense or for relief, will be financed by any and every means available. Issuing billions of dollars of modern Liberty Loans may yet be necessary.
In the trying financial days ahead, when consumer income goes up at the same time that the consumption goods industries turn to war goods production, the Defense Board will have a hard time in nailing prices at current levels. That job will be made more difficult if, as Scherman suggests, the fears and whims of the common man are given a greater influence than they already have. The danger does not lie in the gold at all. What Mr. Scherman really fears is the men who run our government; and those men today have little choice of action. They don't want inflation any more than Book-of-the-Month-Club-President Scherman does, but they are taking a more complete view of our position. No simple, mechanical monetary technique will solve the problems we are about to face. The pure gold standards of Mr. Scherman's sort of individualistic liberalism lie interred with the bones of Mr. Hoover's chicken in every pot."
I also found the discussion in the Congressional Record from 1940 Congressional Record: Proceedings and Debates of the ... Congress
So, in summary, The Book of the Month Club founder, Harry Scherman, was advocating for return to the Gold Standard.
If anyone has an old note from, say, 1934 you will note (The $5 bill for instance - which I used to have when I was a kid and collected) said "This note is redeemable in gold" or something to that effect.
Excellent work, YC! Thanks for posting that.