The Storm Before the Storm by Mike Duncan.
Follows the fall of the Republic as it decays, climaxing with Sulla taking Rome.
Duncan also has the preeminent podcast on the subject, The History of Rome. I’ve listened to it front to back many times.
Next on my reading list is Mary Beard’s SPQR, which I’ve heard great things about.
Noted appreciate it brother 🫡
2nd the book and podcast.
I submit Dan Carlin’s podcast Hardcore History had a Fall of Roman series. I believe it’s behind a paywall now but his latest stuff is great and he’s very entertaining.