Tamara Ireland Stone

Calling Anna and Bennett's romance long distance is an understatement: she's from 1995 Chicago and he's a time traveler from 2012 San Francisco. The two of them never should have met, but they did. They fell in love, even though they knew they shouldn't. And they found a way to stay together, against all odds.
It's not a perfect arrangement, though, with Bennett unable to stay in the past for more than brief visits, skipping out on big chunks...