The Zodiac Mysteries4 books in series
The Cusp of Aries Publisher's Summary
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. As Margo investigates, she finds that there may have been greater crimes committed than art theft—perhaps even a murder.