#27 Nine Elms by Robert Bryndza

Kate Marshall was a promising young police detective when she caught the notorious Nine Elms serial killer. But her greatest victory suddenly became a nightmare. Fifteen years after those catastrophic, career-ending events, a copycat killer has taken up the Nine Elms mantle, continuing the ghastly work of his idol. Enlisting her brilliant research assistant, Tristan…

#19 Three Hours by Rosamund Lupton

n rural Somerset in the middle of a blizzard, the unthinkable happens: a school is under siege. Children and teachers barricade themselves into classrooms, the library, the theatre. The headmaster lies wounded in the library, unable to help his trapped students and staff. Outside, a police psychiatrist must identify the gunmen, while parents gather desperate…