There is a lot of issue regarding ethics. This is a heavy issue that continues to happen to a lot of bloggers is plagiarism and to ensure credit belongs to that person. To the new bloggers I recommend that you credit the person who you took information because if you don't the blogging community can attack with force and we are a tough community. The guidelines of bloggers that we should follow is to create our own pieces of work and reviews. I know that it is hard to create something, but since you are the one reading the book and reviewing it, you should show how much you love that book by using your own words. I've been blogging for almost 3 years, you learn many things about it through others, but it is fun!
I know this is bad but I don't really read non-fiction. I would lead more to a biography or true crime if I was interested in that book but I have seen a few that I was interested in but I have not been able to purchase them yet. I would say that history is another way to read non-fiction because history is always happening.