Stitch in time (Kelley Armstrong)

"Thorne Manor has always been haunted and it has always haunted Bronwyn Dale. As a young girl, Bronwyn could pass through a time slip in her great-aunt's house, where she'd visit William Thorne, a boy her own age, born two centuries earlier. In the wake of a family tragedy, the house was shuttered and Bronwyn was convinced that William existed only in her imagination. Twenty years later, Bronwyn inherits Thorne Manor, exactly when she needs it most,...

In Thorne Manor there is one locked door. Behind it lies a portal to the twenty-first century, and nothing is going to stop Miranda Hastings from stepping through. After all, she is a Victorian writer of risqué pirate adventures—traveling to the future would be the greatest adventure of them all.

When Miranda goes through, though, she lands in Georgian England...and in the path of Nicolas Dupuis, a privateer accused of piracy. Sheltered

...