I'm a novice in terms of bookworm territory, but I've found my favorite book currently.
Flowers for Algernon. It's a story about an intellectually disabled (68 IQ) man named Charlie who wants to get smart. Due to his immense motivation to learn, a research group offers him an experimental brain surgery operation which should increase your IQ. This book explores on how a person's life changes depending on his intelligence. 10/10 book for me, it has absolutely amazing character building.