By 2050, Europe will be unrecognizable. Instead of romantic cafes, Paris's Boulevard Saint-Germain will be lined with halal butcheries and hookah bars; the street signs in Berlin will be written in Turkish. School-children from Oslo to Naples will read Quranic verses in class, and women will be veiled.Despite their Europe-focused content, these books are a largely North American phenomenon. Bat Ye'or (or Gisèle Littman), an Egyptian-born British author, wrote one of the first of the genre in 2005, with Eurabia: The Euro-Arab Axis, which argued that political subservience to a Muslim agenda was turning Europe into an appendage of the Arab world. But most of her recent followers, including Caldwell, the jocular and hyperbolic Mark Steyn, the shallow Bruce Thornton, the more serious Walter Laqueur, and the high-pitched Claire Berlinski and Bruce Bawer, write from the other side of the Atlantic.But in the United States, the Eurabia books continue to proliferate even today, close to a decade after the attacks of Sept. 11, 2001, which triggered the genre. Part of the explanation lies in the post-9/11 narrative of America besieged by militant Islam - a clash of civilizations in which Europe is the front line, threatened by internal subversion. "If Europe is unable to assimilate its immigrants, if Europe is a breeding ground for anti-Americanism and Islamic radicalism - and it is - this is our problem," Berlinski warns in Menace in Europe (2006). "The threat of the radical Islamists taking over Europe is every bit as great to the United States as was