Douglas Hofstadter The Mind's I: http://www.federaljack.com/ebooks/Consciousness%20Books%20Collection/Hofstadter,%20Dennett%20-%20The%20Mind's%20I.pdf
I've found philosophy to be as necessary as logic for the hard problems. Read the introduction. You might conclude that he has some important things to say.
I will read it when I'll have time, but I already have my metaphysics theory about it, that I have already partially shared here:
https://steemit.com/philosophy/@profitgenerator/secrets-of-the-universe-part-1
https://steemit.com/philosophy/@profitgenerator/secrets-of-the-universe-part-2
https://steemit.com/philosophy/@profitgenerator/secrets-of-the-universe-part-3