Enam Al-Wer, Ph.D. (1991) in Linguistics, University of Essex, is a lecturer in Linguistics at the University of Essex. She has published widely on issues in sociolinguistics and dialect contact. She is the author of Understanding Sociolinguistics (forthcoming, Arnold, 2008) and co-authored Arabic in the City (Curzon Routledge, 2008)Rudolf de Jong, Ph.D. (1999), University of Amsterdam, is a researcher of Arabic dialects. He has published on several Arabic dialects, including A Grammar of the Bedouin Dialects of the Northern Sinai Littoral. Bridging the Linguistic Gap between the Eastern and Western Arab World (Brill, 2000).