ما هو كتاب السبع ملائكة

There is no book with the title mentioned, but if you are referring to the book “Rusas Al-Mala’aka Al-Sab’a” (The Heads of the Seven Angels), it talks about the angels and their leaders. The seven angelic leaders are Michael, Gabriel, Raphael, Uriel, Sealtiel, Sarathiel, and Ananiel. The author of this book is Bishop Gregorius, the Bishop of Higher Studies, Coptic Culture, and Scientific Research.