I'm working on documenting the lives of a few great men throughout history and the first on my list is Cato the Younger. I know and have read through Plutarch's life of Cato the Younger, and I was wondering if you all knew of any other classical sources that might shed light on the life of the man. I really appreciate the help and I love the sub! Thanks, guys.
I'm Jimmy Soni, and I'm one of the co-authors of Rome's Last Citizen. Other classical sources worth turning to: Cassius Dio's writings; Plutarch's lives of Pompey and Caesar; Appian's History of Rome. You'll find traces of Cato in other ancient writings (e.g., Suetonius and Cicero), but Plutarch's life of Cato is by far the most comprehensive.
Worth remembering: Plutarch admires Cato, a lot. But it's not an uncritical admiration, and in our final analysis, we take him to be a reasonably credible chronicler of Cato's life. There's also good reason to believe that Plutarch's version of Cato's life was based on eyewitness accounts. Plutarch was, more than likely, working off two now-lost sources: Cicero's Cato, and a life of Cato written by Thrasea Paetus, a Stoic senator in the time of Nero. These were people who knew Cato intimately, which gives us further faith that Plutarch's account, in the words of classicist Robert Goar, "brings us as close to the historical Cato as it is possible for us to come."
This is not a classical source--in fact it's the opposite--but Rome's Last Citizen by Jimmy Soni and Rob Goodman is essentially the first full biography of Cato since Plutarch. It has an extensive bibliography and some original scholarship. If you've not already seen it, I imagine it would be of use in your research.