Showing A Ticket to Die for (Wild Onion Ltd. Mysteries) by David J. Walker

In this, the first book in the highly acclaimed and long-running "Wild Onion, Ltd." series, private eye Kirsten's client is an ethically challenged lawyer who's about to be disbarred, or have his "ticket" taken away. Kirsten enlists the reluctant help of her husband Dugan, also a lawyer, and the two of them head for a sleazy adult bookstore to interview a witness who can exonerate Kirsten's client. When they get there they find the witness, but she's dead in her chair, her neck broken. Turns out the client wasn't totally open with Kirsten, and the case is a whole lot more complicated, and dangerous, than it seemed.