The 17th Suspect

In this #1 NYT bestseller, Sergeant Lindsay Boxer puts her life on the line to protect San Francisco from a shrewd and unpredictable killer.
When a series of shootings exposes San Francisco to a mysterious killer, a reluctant woman decides to put her trust in Sergeant Lindsay Boxer. The confidential informant's tip leads Lindsay to a disturbing conclusion: something has gone horribly wrong inside the police department.
The hunt for the killer lures Lindsay out of her jurisdiction and impacts her in dangerous ways. She suffers unsettling medical symptoms, and her friends in the Women's Murder Club warn her against taking the crimes to heart. But with lives at stake, the detective can't help but follow the case into terrifying terrain.
A decorated officer, loving wife, devoted mother, and loyal friend, Lindsay has always acted with unwavering integrity. But now she is confronting a killer who is determined to undermine it all.
"Just after 4 a.m. under a starless sky, a man in a well-worn tweed coat and black knit cap crossed Broadway onto Front Street, humming a tune as he strolled south to Sydney G. Walton Square. The square was a cozy one-block park, bounded by iron fencing with an artifact of a brick gate set at a diagonal on one corner. Inside were paths and seating and garden beds, cut back now at the end of the growing season. During the day Walton Square was crowded with office workers from San Francisco’s Financial District, eating their take-out lunches near the fountain. At night the streets were empty and the park was occupied by homeless people going through the trash cans, sleeping on the benches, congregating near the gate."