Books like Ultimate Betrayal by Kat Martin

Mandy Ashton fled a stifling frontier existence for the flittering social whirl of Sacramento City, California's state capital, trading childhood innocence for a woman's burning desire. Though it's risky to masquerade as her flighty cousin, Julia. Mandy is determined to give her cousin a chance at happiness with the man she loves. But Mandy is hardly faint of heart-proven time and again on a journey fraught with deadly adventure and sublime temptation. Travis Langley, know by his Indian name, Hawk, is a white man raised by the Cheyenne, a man trying to make peace with his dual heritage. The last thing he needs is a job chaperoning Julia Ashton, the California governor's spoiled daughter. But Mandy-posing as Julia- is spirited, captivating and irresistibly sensuous. By journey's end, Mandy and Hawk have become helpless prisoners of a smoldering passion that nothing can kill-except, perhaps, the secret Mandy has guarded so carefully throughout the arduous days and passionate nights of their long magnificent passage.

Kate Rollins, a single mother in Lost Peak, Montana, seeks a fresh start, healing, and justice while navigating the arrival of the charismatic Chance McLain and a looming threat to her new life.

When charming millionaire Nicholas Ames arrives in tiny Parker's Ridge, Vermont, he ignites the life of timid librarian Charity Prewitt. Yet the man she loves is secretly a former Delta Force operative on a deadly mission to take her home.

There's silver out there: Sabrina Eckhart is sure of it. And when she finds the hidden mine on that big piece of West Texas desert, all of her financial problems are solved. That is, if she can find it. The man with the skills she needs is private investigator Alex Justice—a former navy fighter pilot and a current pain in the neck. When mysterious "accidents" start to plague their search, it seems Rina's multi-acre inheritance might be more a curse than a blessing. And yet, there's still something sensual about the heat…his arrogance…her stubbornness…being thrust into each other's arms by danger… But the vultures are circling, and if they don't watch their backs, the relentless desert sun could be the last thing Rina and Alex ever see.

Beau Reese, accused of murdering his former state senator father, turns to private investigator Cassidy Jones, who believes in his innocence and battles her growing attraction while uncovering the truth.