It’s no accident that the narrator of Carol LaHines’s second novel, “The Vixen Amber Halloway,” is a literature professor named Ophelia. That was also the name of a woman who had her heart broken and was driven to madness by the title character in Shakespeare’s “Hamlet.” When we first meet LaHines’s Ophelia, she is being interviewed by a prison psychologist. Ophelia’s heart has been broken, too, and it is evident that it has led her to do something terrible.