All readers have read a book that they just plainly didn't like. I've read many books that I didn't like or just plain hated *cough* Twilight *cough*. Writing negative reviews can be tough and there is a line that you should definitely not cross when writing one. One thing you should put into consideration when writing a negative review is that the book that you didn't like is an author's baby. DO NOT BASH THE BABY!!! You can say why you didn't like the book without saying that it sucked or all copies of that terrible book should be burned because it was so stinking bad. Also, do not go saying horrendous things about the publisher of the book either, it just makes you look bad and if the publisher sent you that book, they probably won't be sending anymore books your way.
I've only posted on the blog one or two "bad" reviews, but I've read plenty of books that I couldn't finish or did finish and didn't like. I hate writing negative reviews because I don't want any authors to be offended, but I do think that they should still be written because it could save someone money or change their expectations when going into said book. I've read tons of reviews that have helped me weed out books that I wouldn't like.
The way I write negative review is like this:
- State at least one thing I liked about book
- Start going into things I didn't like about book and why (characters, setting, writing, etc)
- Finish off with overall thoughts and saying that it wasn't my kind of book, but others might like it