For me the God have to be eternal, self-sustaining, the Creator of existence itself
And he has to be beyond the concept of existence as well_ like I wouldn’t say god exists _ I would say God is beyond existence.
So once we establish The concept of god in our “very limited human mind and knowledge”_
Because the reality is “If we somehow understand God”_ then he can’t be God
So I hope we established the definition of god for our limited , human mind
Now Can you bring any other religious book that describe this “power” better than Quran?
Because I cannot_ The concept of god is significantly weak in other religions_ even in Monotheistic religious
In Zoroastrianism “God is having a competition with evil_ God didn’t created the evil
in Christianity the “concept of Trinity”
I think Judaism is the closest but You will find a lot of complicated and ethically problematic things in there_ Basically the scripture is corrupted .
So of you believe in one God,if you believe that “This is not coincidence”
Then There is no other book to go other than Quran .
But If you believe the description of God in the book is not aligned with all powerful ,eternal nature of God_ Then that’s a a separate debate
But Quran Is the most strict Monotheistic book you can find .