Thanks for your reply, Alex. Well, there are 11 text books. There are 7 music books (I play the trumpet) and there are 2 novels.
My activation isn't full, but I've the purpose perfectly defined. My purposes are, for example, "Know how was the world in the early twentieth century". I use this purpose to study History. When I'm studyng English, my purpose is "Optimize my English". Actually, I use more than one purpose. I write all the purposes in a post-it. When I'm reading from PDF, I write notes with one software and then I reread.
I do all this, but I've already photoread around 15 or 20 books, and mostly I've rephotoread 5 or 6 times. So I think I need help, and I'm here, asking another time.
Thank you for answer me.
Carles