It appears that thanks to my high intellect I actually possess a photographic memory, to which I'm all thankful for. Thanks to it, I actually remembered everything I learnt previously which helped me advance through these books rather quickly and I don't have to waste my time re-reading things I already know.
Luckily my new parents are clumsy and leave their door to their studies open, so I would just sneak in and start reading whatever I could get my hands on.