Lamya Kaddor teaches Islamic studies in Germany. She's written a new book, Zum Toeten Bereit (Ready To Kill), about the experience of having five former students flee to Syria to join jihadist groups.
Andre Zelck/Courtesy of Piper Verlag GmbH
Fans are celebrating World Book Day on Thursday. Here, a man browses through books at the Albertine, a French bookstore and library at the French Embassy in New York.
Jewel Samad/AFP/Getty Images