At Colorado Springs airport, on my way to Denver:
TSA official at security [pre-check, for that matter]: “We have to search your carry-on, it is suspicious that you have so many books.”
They searched every book.
TC: “Thank you, sir!”
I had fewer books in my carry-on than usual.
The heaviest book I had was Vasily Grossman’s Stalingrad, which is why I had fewer books than usual.