T is for Trespass by Sue Grafton

The provided excerpts introduce a mystery novel focusing on Kinsey Millhone, a private investigator who is often busy with process serving despite a slow period for other felonies. A significant part of the narrative follows Kinsey's investigation into Solana Rojas, a caregiver for an elderly man named Gus Vronsky. Kinsey suspects Solana of elder abuse and fraud, particularly after a suspicious car accident involving Gladys and Millard Fredrickson and concerns about Gus's deteriorating health and financial vulnerability. The story also highlights Kinsey's personal life and reflections, including her observations about her neighbors, Henry and William, and her own struggles with anxiety and a past relationship, all while she attempts to expose Solana's deceptive practices.