Caitlin (Kate) O'Rourke is not your typical Irish-American lass. At six-one and one-hundred-seventy-eight pounds, with dark skin, raven-black hair, and a nose like an eagle, the former MVP setter/middle blocker on the Italian Pro Volleyball circuit is a has-been in her late 20s, prematurely retired due to a blown-out knee. Although retirement does not sit well with Kate, she soon finds herself so entangled in other peoples difficulties that she doesn't have time to dwell on her own problems. Kehough's Irish Pub in Nashville, Tennessee, with its upstairs apartment, is home to Kate, and the pub itself not only provides employment for her brother Seamus and his wife Mary Grace, but serves as an office for her fledgling confidential inquiries business. In 'Creature of Habit, ' the third book of the series, a nun is found brutally murdered on the grounds of Sacred Heart Convent and the police have no leads, no evidence, no motive, and no witnesses. But Sr. Perpetua, Kate's former eighth-grade teacher, suspects that a little mentally retarded girl may have vital information locked away in her mind, and she enlists Kate's help. Now Kate, under cover as a postulant nun, must see if she can find the key to that impaired mind and, at the same time, keep the little girl safe from a killer who wants the information locked away forever.