Trump maybe ghost reads books....
It is, of course, not outside the realms of possibility that he can neither read nor write, or has difficulties with it, and I don't mean that as any kind of slur. There are people that have gotten to adulthood without those skills and managed to hide it well and get by. I did wonder when he handed Charles' letter back to Starmer, and given he tends to ignore auto queues and/or wonder off script (if he indeed has either)