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.

At least, that's what the authors of the strange new genre of "Eurabia" literature want you to believe. Not all books of this alarmist Europe-is-dying category, which received its most intellectually hefty treatment yet with the recent release of Christopher Caldwell's Reflections on the Revolution in Europe, offer such dire and colorful predictions. But they all make the case that low fertility rates among natives, massive immigration from Muslim countries, and the fateful encounter between an assertive Islamic culture and a self-effacing European one will lead to a Europe devoid of all Western identity.