Roosh, to help you better it would be nice to know what do you want to accomplish in the near future in general on the Internet. How do you want to place yourself on the Internet with which products and which type of customers do you want to attract?
A lot of questions, I know but the more specific you could be the more tailored answers you will get. It's a vast field, changing fastly!
Obviously, of course, you want to make a living from selling your books and from ad revenue which you gained via your blog(s)/youtube.
The thing is with Amazon and your crushed reviews you are in a really bad position. Why? Because there is a shift going on which involves the average online-shopper. In the past they had there starting point at Google to look up for there product (eg. book) they wanted to buy. But nowadays the starting point is more and more Amazon because the avg. online-shopper associates Online-Shopping = Amazon.
And here you are with a product with crushed reviews and, I'm leaning out of the windows here, with bad SEO/SEA on the Amazon side. Not good. Performing on Amazon nowadays becomes a lot harder day by day. If you have any doubts, then just look how many new start-ups arise and want to help you with your product placement, keyword optimization, seller-central in general, etc. on Amazon. This is a really good indicator when such new markets arise.
And one thing is sure. If you have set up your books 100% correctly and made the best possible SEO/SEA on Amazon you won't have good sells because of those many bad reviews. There a so many influencing factors but reviews are very important ones.
Check this out to gain some more insights about the behaviour shift:
[1]
Survey: Amazon is burying the competition in search
[2]
Amazon Is the Starting Point For 44 Percent Of Consumers Searching For Products. Is Google Losing, Then?
or just google "online shopper purchasing behaviour google amazon"
I don't know if you are intensively using Google Ads? Did you notice their change of the layout in general? In my opinion it is now a lot harder for content-sites-only to be seen in the search results because of this change if they don't spend money on ads. How's that going on for you since than?
So again, tell us a little more about what do you want to do (roughly) and we might help you better.