Where Are You Now? (novel)

Where Are You Now? (2008) is a suspense novel by Mary Higgins Clark.

ynopsis

Ten years ago, twenty-one year old law student Charles Mackenzie Jr. (Mack) vanished into thin air, after leaving behind his Manhattan apartment without telling anyone, including his college roommates at Columbia University. He does, however, call his mother annually on mother's day, assures her of his health and safety, then hangs up. Even his father's death in the 9/11 attacks doesn't bring him home and his sister Carolyn, twenty-six, eventually tires of the charade and goes searching for him. The next day their uncle, Monsignor Devon Mackenzie, receives a scrawled up letter at his office reading: "Uncle Devon, please tell Carolyn not to look for me."

But despite this warning, and her mother Olivia's vehement disapproval, Carolyn persists, and soon finds herself not only on the trail of her brother, but also a serial killer who has been preying on young women...