Showing Effendi by Jon Courtenay Grimwood

In a slightly different 21st century where the Ottoman Empire never fell Ashraf Bey is the head of detectives in the vibrant city of El Iskandryia, the double dealing hear of the Empire. Raf must investigate a series of brutal murders linked to the mysterious and alluring daughter of an Industrialist who stnads accused himself of a series of ghastly crimes. At once predicatable and shockingly new the world of the Arabesk novels is one of the great creations of modern SF and with Islam so much in the news it is a creation that is never more relevant.