Texas! Lucky / Sandra Brown.

Enhanced descriptions from Syndetics:

The first book in #1 New York Times bestselling author Sandra Brown's beloved
Texas! trilogy introduced readers worldwide to a captivating family struggling to go on without its patriarch--and to a man in pursuit of an elusive woman who may hold his future in her hands. Here is a saga told only as Brown can…an adored classic.

If middle children were born to rebel, Lucky Tyler was true to type. Charismatic and good-looking, his romantic conquests had earned him his name--while his temper had earned him a reputation as the family hothead. And one unfortunate night the sight of a woman being harassed got the best of him. The fight that ensued was predictable--the woman was not. Maybe Lucky was old-fashioned, but he'd expected at least a "Thank you" before she drove away. Then again, maybe chasing after a mysterious stranger was just the distraction he needed.

But the woman had a knack for disappearing--even after Lucky tracked her down. Even after they shared a night neither would forget. He was determined to find her yet again, but this time his search would be fueled by more than desire. For during the night a suspicious fire had broken out at Tyler Drilling--and Lucky was the prime suspect. Now the woman was more than his obsession, she was his alibi.

Cornered by her own deception, Devon Haines had tried her best to escape Lucky. Yet his bold pursuit and self-assurance disarmed her in a way she'd never experienced. But Lucky was about to ask for something she was terrified to give. Clearing his name would mean revealing a secret he'd regret ever knowing. Refusing could cost him everything. And doing either could mean losing him forever.

Pulsing with suspense and romance, here is the sweeping tale of a close-knit family and the daring, irreverent, irresistible heirs at its center.