From the publisher:

In what may be her most unsettling novel to date, Sue Grafton's T is for Trespass is also her most direct confrontation with the forces of evil. Beginning slowly with the day-to-day life of a private eye, Grafton suddenly shifts from the voice of Kinsey Millhone to that of Solana Rojas, introducing readers to a chilling sociopath. Rojas is not her birth name. It is an identity she cunningly stole, an identity that gives her access to private caregiving jobs. The true horror of this novel builds with excruciating tension as the reader foresees the awfulness that lies ahead. The wrenching suspense lies in whether Kinsey Millhone with realize what is happening in time to intervene.