There are many things you need to consider. Effective stack size, blinds and antes in play, position and the villains tendencies. Doing some research on these things will help you be confident when playing these hands. For one you should never limp these hands. Ever. In general you should just be folding KJo KQo and QJo from early positions. KQs and QJs I play from just about anywhere if I'm on a healthy stack. Throwing away QJs to a 3 bet usually. If you don't connect with the flop just throw them away. These are drawing hands. Don't over value having top pair with QJ. AQ and KQ have you beat. Remember that if you just flat call the original raiser, they have AA KK AK AQ QQ in their range and if the the board comes Q 7 2 and they are betting like they got the nuts, they probably have you beat. These broadway hands are are drawing hands. Ideally you want to have top 2 pair or a straight or flush at showdown and when youre betting. Don't bet to just bet. Be aggressive when you have a strong hand and get money in. Hope this helps GL!
As far as books go I've been told the grinders manual is a solid choice. Never read it or any poker books to be honest.