Cell.

This is an apocalyptic horror novel. A New England artist visiting Boston to sign a publishing deal gets caught in the middle of a nightmare scenario when a strange signal broadcasted through the cell phones turns the majority of humans into zombie-like creatures.

Like so many other Stephen King's novels, the book received plenty of accolades from critics and readers alike. As of November 2009, it seems as if a film adaptation of the book is in the works and Stephen King himself was in charge of the screenplay. The Internet Movie Database has also published some information about it here.

Technical description:
Title: Cell.
Author: Stephen King.
Publisher: Hodder & Stoughton.
Edition: first hardcover edition, London (UK), 2006.
Pages: 399 pages.
ISBN: 0-340-92144-7