I think Lest Darkness Fall by L. Sprague de Camp is a wonderful classic. It's arguably the beginning of alternate history. While on the classics, I loved A Connecticut Yankee in King Arthur's Court. In historical novels, I've enjoyed reading Roman mysteries which seem to be popular these days as well as Reed and Mayer's John the Eunuch series. The classic for Napoleonic historical fiction is C.S. Forester's Hornblower series. Excellent. I also enjoyed the Aubrey/Maturin series.
Rob Preece
Publisher,
www.BooksForABuck.com