Reddit reviews Skyjack: The Hunt for D. B. Cooper

There's a great book on Cooper called Skyjack: The Hunt for DB Cooper ... definitely read it if you're interested in the case.

Yup. Read the book Skyjack. The author very comprehensively explores every major and somewhat credible theory as to who D.B. Cooper was, and while the author himself doesn't eventually conclude anything, in my mind this theory was the most plausible and did not have any major discrepancies like all of the others.