Her Surprise Sister by Marta Perry

Violet Colby is shocked to discover she has an identical twin sister. Hoping to develop a sisterly bond, Violet invites her sophisticated city twin to Colby Ranch in tiny Grasslands, Texas. But when her sister's former fianc , Landon Derringer, arrives with questions of his own, Violet finds herself drawn to the handsome businessman. And learns that true love requires faith--and a heart as big as Texas.

Her Rancher Bodyguard by Brenda Minton

Bodyguard Boone Wilder isn't keen on his latest mission: watching over a pretty politician's daughter. Boone is from quiet Texas Hill Country, and Kayla is a city girl. But once safely settled at the Wilder Ranch, Boone realizes there's more to Kayla than he first realized. And when he discovers that she's in danger, Boone must risk his heart to protect what he cares about most.