The book "أسباب النزول وأثرها في التفسير" prepared by Essam ben Abdelmouhsen Al-Humaidan is an important work in the field of Quranic sciences. This book explores in depth the subject of the causes of the revelation of the Quran and analyzes it from different historical and classification perspectives. It examines in detail the two most important books dealing with this subject and discusses the scientific rules related to it, such as contradictions between accounts, preference between them, multiplicity of revelations, and forms of the causes of revelation. The author of the book, scholar Essam bin Abdelmouhsen Al-Humaidan, carried out a careful compilation and verification of all the accounts relating to the causes of the revelation present in the books of Al-Wahidi and Al-Suyuti. This book offers a precise classification of the causes of revelation and contributes greatly to a better understanding of the Quran. It was published by the Center for Quranic Studies, thus constituting a valuable contribution to Quranic research. Readers and researchers will find it a reliable source for a better understanding and interpretation of the Quran.

This book is structured in four parts, preceded by an introduction and followed by a conclusion. The introduction aims to highlight the importance of the research and the reasons for its choice. The first part deals with the causes of revelation, their meaning, their types and their sources, with three distinct chapters. The second part addresses the rules relating to the causes of revelation, with five chapters, covering in particular the preference of narrations, the universality of the discourse and the specificity of the cause, as well as the relevance of verses linked to the nations preceding the causes of the revelation. revelation. The third part delves into a historical study of the causes of revelation in three chapters, exploring the efforts of scholars to know the causes of revelation, the books devoted to this subject, and a comparison between the causes of revelation according to Al-Wahidi and those according to Al-Suyuti. Finally, the fourth part entitled "Reasons for Revelation in the Balance" is composed of four chapters which distinguish the genuine causes of revelation from the weak ones, as well as the impact of the causes of revelation on their interpretation. This last part also highlights the advantages and criticisms formulated by researchers in this regard.