I'll Be Leaving You Always — Sandra Scoppettone

Outside of Lauren's relationship with her lover, Kip, Megan is her oldest and dearest friend. But when Megan is held up in her Greenwich Village jewelry store and then killed, Lauren soon discovers how little she knew of Megan's life.

Hired by one of Megan's ex-husbands to investigate, Lauren takes a microscope to a life she thought she knew intimately and finds a secret world of deception and danger. As Lauren moves closer to the solution to Megan's murder, she uncovers some unpleasant truths about herself--- and realizes how much she needs a little help from her friends.