If he really wanted to read through every bit of information in this outer library, even if he was parsing and flipping through each item it wasn't a task that could be completed in a few years. He still had to prioritise somewhat, especially considering he didn't plan on spending all of three years, much less all of the year or so he would stay at the Academy in the library. He still had other things to do here, as well as other avenues for information.
In other words, he had to pick and choose what to read, and what to exclude. Of course, it would still be good to read a few items from each section to get a better gist of what it contained, what style it was written in, and if or if not it had the potential to be helpful.
