The Runner by Rachel Henke

In the third novel in the mystical time travel romance series, a new timeline unfolds for fated soul mates, Cara and George in the Twin Flame universe.

Present day
Newlyweds, Cara and George Cavendish, have achieved their dream of bringing their Tudor ancestral home, Willow Manor, back into the Cavendish family. They are busy making plans for a Tudor Heritage Centre on the estate, and the Twin Flames are more in love than ever.
But all is not as it seems in a house that holds so many secrets from the past. When Cara stumbles into a mysterious gateway, she discovers there is more than one way to time travel, and their Twin Flame mission is far from over.

Georgiana
In 1729, Lord George Cavendish is master of the grand estate, Willow Manor, which has been in his family for centuries. After a stormy start, the handsome and wealthy bachelor falls madly in love with the irresistible but penniless young woman, Caroline, who is governess to his beloved sister, Olivia.

George knows his duty is to marry someone suitable to continue his noble bloodline and protect his family and fortune. He runs from the truth but is unprepared for the power of a love that transcends logic, class, and time.
In the dark desperate days of separation, George loses Willow Manor in a card game. He vows to burn the house to the ground with himself inside because he cannot live with or without his one true love.
Cara and George are once more pitted against time and risk losing their past and their future.

Enjoy page-turning, spellbinding dual timeline twists and sweeping romance as you follow the adventures of the indomitable Twin Flames.