The key is being a generally focused soul, mentally and emotionally in all you think, feel and do.
Then 'generally' each and every book is found interesting for what it is and even sometimes what it is not, so far as concerns your own interests, your own agendas.
However, with so much of life ahead of you, how can you know what will be 'useful' to you along the way? So I would not second guess anything at this stage!
Gosh, go Photoread a whole set of encyclopedias with the sheer joy and wonder at how much there is interesting going on in this world!!!
