In the layers of readers, the author began with the translations of readers starting from the Caliph Othman bin Affan to the era of Al -Dhahabi, and he has shown himself on the topic of the book and said: "As for, this is a book in which the knowledge of the famous readers is the first to support and mastery, and to progress in the countries over the classes and times And God Almighty is the helper. "Al -Dhahabi has divided his book into 18 classes