JADE GREEN, THE would-be hard-boiled heroine of Maureen Due’s erudite and entertaining detective- cum- love story, models herself on Raymond Chandler’s grizzled, chain-smoking private eye Philip Marlowe, who still sets the standard for private-detective cool. Like Marlowe, she is a wisecracking cynic, a wounded romantic and an idealist in pursuit of justice, who leads a solitary, hand-to-mouth existence. The similarity ends there: Jade is a young, gay woman who can’t even master the smoking habit and sits in her office surfing the Internet instead of pulling on her hat and raincoat and going off into the mist. While she constantly invokes Marlowe, she wryly reminds herself that she is a lawyer and not a ‘lapsed gumshoe’. She runs her own practice, the ironically named Lost Causes, from her London flat, supplementing her rather meagre income by delivering for the local Chinese takeaway.