And Kill Them All — J. Lee Butts

Determined to find her family's murderers, fifteen-year-old Clementine Webb vows to hunt them down, one by one. Texas Ranger Lucius Dodge tries to talk some sense into the little lady. Trading lead with stone- cold killers is men's work. At least it's what Lucius always thought- until darling Clementine shows her aim is true.