McNish, Jacquie. Losing the signal : the untold story behind the extraordinary rise and spectacular fall of BlackBerry / Jacquie McNish [and] Sean Silcoff. - First Canadian edition. - London : Penguin, 2015. - 279 p. ; 24 cm. Includes index. Includes bibliographical references. ISBN: 9781847941725 (pbk.) Subjects--Corporate Names: BlackBerry Limited--History. Subjects--Topical Terms: BlackBerry (Smartphone).