The Easy Sin is a 2002 novel from Australian author Jon Cleary.
[1] It was the nineteenth (and penultimate) book featuring Sydney detective Scobie Malone.
[2] The plot concerns the murder of a housemaid to a dot com millionaire.
Kidnappers thought they have grabbed the millionaire's girlfriend, not realising they've taken the millionaire instead.
Matters are complicated by the involvement of the Yakuza.