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Libraries in my area are stocked with multiplebduplicates of shiny lib memiors/biographies gathering dust. Meanwhile the books I really want have a months-long waitlist, if they are available at all.
Despite his obvious admiration for LBJ, Caro does not hide the man's faults. He chronicles Johnson's shiftlessness after high school, his physical cowardice, his vulgar table manners, practicing law without a license (or even a college degree), making his subordinates carry on discussions while he was on the toilet moving his bowels, telling them that it was their job to "kiss my ass and tell me how sweet it is," his extramarital affairs, and all of it. He even stole a few elections, beginning in college.
I have not been inclined to read any of the biographies on Barack Obama, and I don't know if there have been any published on Joe Biden. Don't know if I'll ever read them. But I seriously doubt any biography written on either of them will ever be as honest about their faults as Caro's on LBJ.