George Packer's The Unwinding will learn you a thing or two about Biden. He's no Dick Cheney but he's a semi-unpleasant person. For me, he'll always be the plagiarist that ran against Dukakis.
I looked at the preview of The Unwinding on Amazon. Looks a little hard to follow in spots, since he tries to pack so many disparate events into one story. But it does look interesting. I will put it on my list of books to read. I, too, am old enough to remember Biden's plagiarism scandal. In fact that was the only thing I knew him for until he once again disgraced himself as one of the prime sponsors of the expansion of the police state known as the RAVE act - https://en.wikipedia.org/wiki/Reducing_Americans%27_Vulnerability_to_Ecstasy_Act I had forgotten, until I looked at the Wiki article, Madam Clinton's involvement with that. I used to be a Republican (actually still am registered as one). I am glad I discovered the Libertarian Party before my revulsion with mainstream Republicans drove me into the slimy arms of the Democrats. (Note I say "mainstream" because I cannot rule out supporting Republicans like Ron and Rand Paul who, with all of their flaws, I can at least think about without total disgust.)