Believing in the Oneness of Allah is a basic fundamental in Islam. This belief establishes the relationship between human beings and Rabb (Lord). As Muslims, we firmly believe that Allah is the Creator, Sustainer, and the True God – only He has the right to be worshipped, there is no partner with Him and only He has created the Universe. In this booklet which is designed for children and/or beginners, we have prepared 50 questions of the belief of Islamic Monotheism and provided short and simple, but comprehensive answers to them.