My favorite author is Steven Saylor, he writes mostly historical fiction mysteries set in the Ancient Roman Empire. His series called the Roma Sub Rosa Series is my favorite and it includes 12 books, he is also the author of ROMA and the upcoming EMPIRE. And I personally communicate with him.
The last 4 books I bought were:
"The Silver Eagle" by Ben Kane
"Lives of the Later Caesars" by unknown authors(Its by historical authors.)
"A Day in the Life of Ancient Rome" by Alberto Angela
"Alexandria" by Justin Pollard and Howard Reid