In Honorius III et l'Orient (1216-1227), Pierre-Vincent Claverie offers a large-scale study of the oriental policy developed by Pope Honorius III at the time of the Fifth Crusade. His book is enriched by 150 unpublished bulls presenting Honorius III as a worthy successor of Innocent III and a constant defender of the Holy Land. Its scope embraces also the relations of the Holy See with the Latin clergy in the East, the different oriental christian faiths and the military orders.