Atenism was NOT the first monotheistic religion?

People say that when the pharoh Akhenaten said to only worship the Egyptian God Aten, it was the birth of monotheism. I have literally read world history text books that say this. But I think this is false. Monotheism is beliving there is only one God, but I don't think atenism made this claim, rather it just made the claim that Aten was the only God worth worshipping. I think monotheism started with with the Abrahamic faith or with Zoroastrianism.