[Hisba is a term referring to the right of a Muslim to defend public morality and suing on behalf of religion.] The article comments on one of the four books published recently by the Gama´at Al-Islamiya. The book discusses the concept of hisba. The leaders of the Gama´at admitted that hisba was wrongly practiced and has led to many grave mistakes which had harmed those who practiced it and those who fell victims of it.