Bismillahir Rahmanir Rahim Assalamu Alaikum, dear brothers, sisters and friends. Known as the book written by Muhammad ibn Saleh al-Uthaymeen, "Explanation of the Principles of Faith." In this booklet, the author has given a knowledgeable discussion and correct explanation about the basic foundations of Islamic Aqeedah. The importance of the book is immense for acquiring the knowledge of unadulterated Islamic Aqeedah. All the pages of this book are highlighted in this app. I published the whole book for free for the Muslim brothers who could not afford it. Hope you will encourage us with your valuable comments and ratings.