Great Risala Magisterium on an issue that has been subject to divergence and which is very interesting: The judgment of Khawarij, they are disbelievers or Muslims?
The author of the research brought together the words of the great scholars of Islam who see their disbelief, and evidence for it, then the opinion of scholars who do not see their disbelief, and evidence for it, and end the predominant speech and consequent Hukm (warning, boycott etc …).