The Cusp of Aries (The Zodiac Mysteries Book 1)

"On an Earth-like planet called Astrogea, people are tattooed at birth with their zodiac signs, which dictate how they look, where they live and with whom they associate. This categorization has resulted in some hostilities between people of different signs or groups of signs, but no one is more disdained than the Cuspians--those born between signs who don't strongly identify with either. Astrogean private investigator Margo Ramm is summoned by Dermot Justice, a wealthy, ailing politician, to find some priceless pieces of art that have gone missing from his home. Margo arrives to find his vast villa full of potential suspects: Justice's ill-tempered second wife; his stern personal physician; his self-important business partner and the partner's supermodel daughter; a niece and nephew with checkered pasts; and the musician husband of Justice's deceased daughter. As Margo investigates, she begins to doubt the houseguests' supposed concern for Justice's health. She also finds that there may have been greater crimes committed than art theft--perhaps even a murder..." -- Kirkus Reviews