This is the last book in the Rock Creek Six series. The entire series was good. Very enjoyable books to read. Cash will stand alone, but I would suggest you start with the first book and go from there.
This is book 6 of the Rock Creek Six. From the cover:
To the folks in tiny Rock Creek, Texas, Daniel Cash was a ladies' man with a smile as quick as his draw. Yet the infamous gunslinger with the lengendary charm harbored painful memories of the girl he'd left behind when the War Between the States demanded his duty. Cash believed Nadine Ellington was better off without the man he'd become, but when she rode into town, dragging his past with her, Cash was tempted to consider another future...with her by his side.
Nadine had long ago given up waiting for Cash to return--she was too busy raising the son he didn't know he had. And though she'd never forgiven Cash's betrayal, she needed him now--to prove to their reckless, headstrong child that the life a a gun-for-hire is no life at all. But seeing Cash again awakens feelings she'd thought long dead--and soon she's wondering if the boy she once loved still lingers beneath the hardened face of the man she can't resist...