Search - Boston Renegade (Harlequin Historical, No 139)

Dodging bullets was second nature to Blake Morgan,yet his latest assignment befuddled his usually flawless instincts when his primary suspect become his primary temptation...Hanna Winters.Sister to a nefarious outlaw,Hanna surprised Blake when in the face of danger her fragility turned to Stalwart determination.But did her staid exterior hide the secrets he searched for,or was it only a front for her loneliness and isolation?

From the cover:
THINGS WERE DIFFERENT IN THE WILD WEST
Amelia Prescott just couldn't believe it when she woke up to find her legs entwined with those of the roguish Gabriel Hatch. But she had no time to reform the handsome reprobate, even if he did have more charm than could possibly be legal.

Miss Amelia Precott sure was something, Gabe decided. The Eastern do-gooder who'd braved the frontier to rescue her wayward brother had blossomed beneath the wide Western skies - and miraculously made his own jaded heart begin to thaw.