Any idea of how to do that? I’ll try something, I have 2 small books, both about politics, in the same collection. So they are comparable in length, subject and complexity. Both books are interesting for me.
I will read one normally, and I’ll use the subject matter to test my comprehension and memory, drawing the most detailed mind map I can, without looking in the book.
I will photoread the other and do the same test.
What do you think about this test? Any suggestion, remark? Thanks 
Richard