Hi George. It is highly unlikely that Amazon "hacked" your computer. I am not sure why they would tell you that. I am currently reviewing the other information you posted.
George. I think you have either misunderstood what has been explained by others, or you have received some very bad information. None of the companies you have mentioned engage in the activities you have described (other than perhaps Geek Squad).
The publisher for your wife's book likely has agreements with retailers and wholesalers all over the world including Amazon. If you suspect the publisher is in violation of their contract with you, that is something you will have to contact an attorney about. Ebay, Amazon, Microsoft will not be able to help you with any of that.
Amazon's CEO is not Mike Piesheit, it's Jeff Bezos, he is also the founder of the company.
Microsoft is a software and hardware manufacturer. They are not involved in supply chain logistics in the manner you describe so I don't understand why you would have been told that they would be taking any action on your behalf.
In regard to the eBay sales... the sales numbers you are referring to are the total number of transactions they have on ebay (buying and selling) for ALL products, not your book specifically. The numbers do not refer to the number of sales for the book you mention. As near as I can tell, this seller only has 2 copies for sale and they have not sold any.