Is it a good idea for AdSense?

Hi guys, I'm going to build a website and using AdSense. the website will be about introducing new books or reviewing famous books. Is it a good idea for making money from AdSense? I think it is good, but it's impossible to be successful! Because book can be sold online, so there a lot of online shopping websites, so I don't have any chance for SEO among these big websites.
What do you think? and how can I understand that a keyword is suitable for adsense or not? Is there any tool?

from AdSense http://ift.tt/1HnV6QS
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