Would like to answer but the question is too broad. What subjects are you talking about? Programming, algorithmic, logic, hacking, and others linked to informat

Would like to answer but the question is too broad. What subjects are you talking about? Programming, algorithmic, logic, hacking, and others linked to informatics in general, or other subjects? And by textbooks, do you mean out of all the textbooks in general, or per difficulty level (ie introductory, advanced, etc.)