I picked up Marcus Aurelius's Meditations. I'm almost done with the History of Rome podcast, and I am glad to have some more context for reading it.
I got that myself not long ago. I haven't really gotten into the body of it yet, but the historical context is interesting. I was especially fascinated on the Stoics' idea of logos, and how that was context for when Christianity started talking about The Word.
Since you're about done with the History of Rome, if you happen to be looking for more: - "12 Byzantine Rulers" is a short but pretty awesome series on the Eastern Roman Empire - "Emperors of Rome" is super interesting too and it's still going, I find Rhiannon Evans really interesting to listen to (she's a lecturer in Mediterranean History), and Matt Smith the main host is always very excited and interested in the topic. - "When in Rome" is about the history of different places in the city it's also by Matt Smith but the co-host changes. Also, Meditations is a great book, enjoy it!