Title: The Bedroom Barter (Harlequin Presents #2442) (Foreign Affairs)
First published: January 1, 2005
Description: Chellie Greer is a long way from home. Penniless and without her passport, she's stuck working in a seedy club with no means of escape - until Ash Brennan walks in. What's such a powerful, irresistible stranger doing in a place like this? 

Ash offers her a way out, but Chellie has to wonder exactly why he is rescuing her. Does he really want to protect her, or is there a price on her head . . . and on her body

Skimmed the first few pages

Forced to work in brothel as a songstress
 rescued b/c H knows she's an heiress
She just thinks he's a nice guy
Subjects: Runaways, Private investigators, Fiction, Fiction, romance, general
Places: South America
People: Ash Brennan & Chellie Greer