Actually, I didn't read this one. I just unpacked and somehow aquired two of them. So I'm putting one "up for adoption."
From the back:
"Alice Loudon has it all: a devoted boyfriend, a marvelous circle of friends, a challenging job as a research scientist. Then one morning, on her way to work, she exchanges a lingering look with a man so devestatingly attractive he takes her breath away- a daring mountain climber who has been hailed as a hero. As a lover, he is more passionate than Alice's wildest imaginings. Soon there isn't anything or anyone she wouldn't give up to stay by his side. Now all she has is Adam, and life with this stranger will take her to new depths of madness...and fear.
From internationally acclaimed author Nicci French comes a shattering tale that's being called one of the best psychological thrillers of the year.