A book translated into English contains twelve lessons in Islamic fundamentals: (1) The meaning of testifying that there is no god but Allah, (2) The meaning of testifying that Muhammad is the Messenger of Allah, (3) The obligation of obeying Allah and His Messenger, (4) Virtue of monotheism, (5) Meaning of the religion of Islam, (6) Meaning of worship, (7) Meaning of disbelief, (8) Warning against polytheism and its types, (9, 10, 11) Warning against hypocrisy, (12) Nullifiers of Islam.