I don't know about "the best" in terms of its accuracy and rigor of research but I thought that Nick Tosche's "Night Train/The Devil and Sonny Liston" really capture the spirit of the man. It was conservational and edgy -which I found appropriate.
It's the most readable by far, but it must have set your bull**** detector off at times? Very probing on the Mafia connection though, probably definitive. Rob Steen did a decent "straight up" bio. Both better than Ali & Liston, I think.
Remnick's one was a good read too. As was the film based on the book,starring Terence Howard as Ali. Howard was pretty good as the young Cassius Clay. Although not quite as good as 'Chip' McCallister who played a young version of the Greatest in the 1977 film of the same name.
Sure -I write in the margins of every book I read. That one has "huh?!" and "come on, man!" in quite a few places.
A few, to me, golden nuggets from this book ... Joe Louis, in Liston's camp pre Patterson one .. Said he thought Satterfield was a better one punch hitter than Liston . He also noted that Sonny was not very effective punching down ... (again, this was pre-Patterson) Liston on D'Amato: He drew the color line .... Only fed Floyd weak white fighters and ducked the best black ones like Machen and Foley and himself. Jimmy Cannon rips Cus as extremely manipulative and stacked every deck imaginable for Patterson , favoring locations and ref's with ties to him ... Just some interesting items ..