I've seen it, and didn't find it very convincing. Graeber presents some interesting anecdotes regarding selected ancient social conventions, which may or may not be accurate[1], but—in my opinion—even taken at face value they don't really support his conclusions regarding the nature of debt. Perhaps the book would seem more compelling to someone who already shares the author's worldview.

[1] https://www.bradford-delong.com/2014/12/2014-11-24-mo-ann-le...