Book Recommendations on the Ego?

[Phoenix]

I am Ra. We cannot work with this concept as it is misapplied and understanding cannot come from it.

Could it be they gave that answer because the ego in itself is illusionary?

I can't guess at Ra's meanings, so, it could very well be. I find it interesting they use the word 'misapplied'. Perhaps they mean that the concept of ego we have links very heavily with the mind and does not include ego as an energy but talks of it as a sort of 'inner demon'. Also that everyone's ego is seen as the same, not that some might ally or non ally with the 'ego'.