The invitation of the messengers

This is the first book in the series of the history of the call to Allah the Almighty. The book is divided into two main sections. In the first section: the book narrates the situations of the messengers with their peoples and how all the messengers agreed on the foundation of the call, which is the monotheism of Allah the Almighty, even though they differed in the branches of legislation as Allah the Almighty commanded them. And the second section: the main pillars of the divine call, in which the author discusses the fundamentals of the call.