The Unfinished Odyssey of Robert Kennedy is my favorite Halberstam book. Here's a snippet from Victor Navasky's* 1969 NYT review, which included another book on Kennedy.

Pulitzer Prizewinner David Halberstam's "The Unfinished Odyssey of Robert Kennedy," is better written, more analytic and more judgmental than "85 Days," but ultimately it is less successful. Partly this is because many of Halberstam's perceptions, first unveiled in Harper's Magazine profiles on Robert Kennedy and Allard Lowenstein (to whom Halberstam assigns a more significant role in the Robert Kennedy story than does Witcover) are by now familiar elements of public discourse.

It is also because "Unfinished Odyssey," as a comparison of titles suggests, is more ambitious and experimental. For example, Witcover's organization is chronological, predictably proceeding from top-secret deliberations in New York through campaigning in Indiana, Nebraska, Oregon, California, the murder, the memorial service, the train, the funeral and the aftermath. Halberstam starts with Allard Lowenstein's anti-Johnson movement, takes Kennedy through the Indiana primary, then flashes back over his career before his campaign, picks him up again in Nebraska, rather sketchily follows him through Oregon and California and there the book stops. It doesn't finish, it just ends, as Kennedy ended, abruptly, on election night. His structure--unfinished, incomplete--is his metaphor.

The final sentence reads: "Then he descended to acknowledge his victory, to talk about the violence and the divisiveness, and to let a nation discover in his death what it had never understood or believed about him during his life." It didn't quite work for me on first reading (in fact, I thought my copy was missing the concluding chapter) but the more I think about it, the more I find it provocative.

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*Navasky's Naming Names -- about Hollywood's blacklist-- is also on my shelves. Another quality work.