i just had an idea to create a book review website. i am an amazon affiliate and thought about this strategy... find keyword search terms, for example "best fitness books" *not my niche* and then find 3-5 books on amazon that get a lot of sales. download free PDFs of them. then write a synopsis or take some good tips from the books and give them to readers for free. then add a link to the amazon affiliate page. is this a profitable strategy? can book review blogs make good money?