This is the sixth volume of the now well-established Yearbook of Muslims in Europe, covering the calendar year 2013. This year the volume includes only 45 countries, as contacts with our Belarus author have failed—we hope to have it back next year. We have as usual omitted the Vatican and the three mini-states, Andorra, Monaco and San Marino.

While the continuing financial crisis has drawn media and political attention away from Islam and Muslims, much attention returned to the question during 2013 after something of a lull the previous year. The great…