Margaret Daley 
Texas Ranger Showdown [EPUB ebook] 

"Stop me."She was taunted by a killer.Margaret Daley’s thrilling Lone Star Justice series continues, this time pitting radio therapist Dr. Caitlyn Rhodes against a methodical murderer. First, her patients are found dead, then the mocking phone calls start. The evidence is pointing Texas Ranger Ian Pierce to one conclusion: he must protect Caitlyn from becoming this vicious killer’s next victim…before he loses the woman he once loved-for good.