Oddly enough my own (limited) experiences with lucid dreaming didn't really break down the barrier for technical details. Sure I knew I was dreaming, I could think about and control what I did, but I still couldn't read a book. When I was younger there was a time where I kept having dreams about writing books on various subjects, it felt like I was actually planning out the arrangement of topics and writing down the words, and yet as I woke up everything was lost. So did I actually compose a story (because yes, I've written some short fiction) and then forget the whole thing, or did another version of me write down the stories and I simply couldn't bring that knowledge back with me from the parallel universe?