I often buy books and read some chapters that interest me. I get most out of such books months or even years later when I can appreciate their content better. I

I often buy books and read some chapters that interest me. I get most out of such books months or even years later when I can appreciate their content better. It's good to know that I've the stuff at my hand, often there are explanations, algorithms, concepts in a depth one rarely finds on the net.