I read the first of the Conqueror series. It was very good. I had some trouble with it because I'd just finished Genghis Khan and the Making of the Modern World by Jack Weatherford before I started. I found that difficult - switching between a purported history and a historical fiction of the same events and man so closely together, so I bailed on the series for the short term. I'll probably go back to it at some point though.
I recommend The First Man in Rome by Colleen McCullough if you like historical fiction and the end of the Roman Republic. It's based around the political machinations of Marius and Sulla. There's a whole series, only read the first two, but they were really very good. Rich and tense. Just well done.