I read a lot of history books for my research: I have on the kitchen table right now a volume of the history of the Supreme Court, about 1500 pages, not light reading. So, when I go upstairs in the evening, and read for pleasure, I often read historical fiction.
Most often I read about the nineteenth or twentieth centuries, novels such as the Hornblower novels of Forester or the WWII novels of Alan Furst. But occasionally I venture farther afield, as in The Medicus Codex by Cy Stein, set in Rome in the third century AD.