By His Vow

In Tracy Lorraine's steamy billionaire romance, a young woman inherits her father's estate and must enter a year-long marriage with her brother’s best friend, Kingston Callahan. As their forced partnership unfolds, sparks fly amid the tension of their opposing worlds and hidden desires. Set in the Callahan Billionaires universe, this story explores the complexities of forbidden attraction and heartfelt connection in a compelling enemies-to-lovers narrative.