I thought I knew everything about Gwen Matson. We've been best friends since sophomore year at Analy High. I know her to be smart and confident with a retro style that would give Jackie O a run for her money—albeit a graceful, sweat-free run in kitten heels.

Not once did she ever display a rabid need to record every detail of her existence. But never before had she gone on a weekend road trip with her amazing boyfriend, Coop…and his evil, yoga-toned best friend, Devil Blonde Dannika. Now she's writing to me like mad.

Not that I'm complaining. I'm in gay Paris (good), meeting my future in-laws (bad), so her tireless scribbling is keeping us both sane.

Usually, a well-thought-out What Would Jackie Do? helps Gwen pull it together. But this crisis is beyond help. I know Gwen and Coop are meant to be, but can their love withstand Gwen's psycho jealousy and Dannika's twisted sabotage?