The Givenchy Code - Julie Kenner

A mind-bending code spawned from the mind of a madman...or maybe just a jealous ex.
A desperate race through the cathedrals and hotels of New York City...with a teeny bit of time for shopping, it's true.
An astonishing truth concealed for years, unveiled at last...with more than a little help from a supercute new guy.
As if a recent breakup, scrounging for rent money, and lusting after designer shoes weren't enough, Melanie Prescott starts receiving obscure codes and clues from a menacing stranger. She attempts to solve the mysteries -- enlisting the help of a tall, dark, and handsome new friend -- with high hopes for the multimillion-dollar reward guaranteed at the end (handbags, sunglasses, and shoes, oh my!). That is, if she can survive the deadly game.