I generally advice people who are new to markets avoid reading trading books at least which talks about trading methodologies. Rather find some good traders near your place or you can take help of internet by joining some good forums like Traderji where many experienced traders visit and willing to share their trading methodologies with everyone with out any cost.
My experience, Books reading not helpful when you want to trade in markets which is too much complex and depends on so many factors to work on same time.
As far as risk reward is concerned every book has its own definition, so best will be this question you ask yourself before trade

. Everyone has its own risk taking appetite.