They want to be taken away to another time and place when life was different. They want to learn something about their heritage or past. They want to see history come alive. But no matter what they're looking for, they want some amount of history in their books. Here are a few suggestions for how to make history come alive in your romances.
Dialogue Use colorful terms that portray the period.
Be sure terminology or slang is correct for the period and setting. Use authentic dialogue with care, however. Don't use anything too peculiar or unfamiliar unless you make it important to the story. Think of historical words as seasoning. The seasoning mustn't overpower the dish.