Dead Beat — Patricia Hall

A tense and gripping mystery set in 1960s London and Liverpool - When photographer Kate O'Donnell takes off for London from swinging Liverpool she has two things in mind: to make a career and to track down her missing older brother. But when she does find a trace of Tom, he's still missing--leaving behind a dead flatmate and some very suspicious cops, including Harry Barnard of the vice squad. Kate determines to clear her brother's name, but her investigations take her on a terrifying journey, and soon she isn't sure if even the charming Barnard can be trusted....