Nina Bruhns’s “A Kiss to Kill” is an engrossing romantic thriller book. Before Gregg van Halen’s final betrayal eight months ago, Dr. Gina Cappozi and the CIA black ops commando were in love. After being captured by terrorists, Gina vowed to murder the guy she had loved. Gina and Gregg find out that the power of love outweighs the power of betrayal and retaliation as danger approaches and secrets come to light.