“A good review is considered nepotism; a bad one, professional jealousy. Can
authors be trusted to make a fair assessment of their rivals' work?”
There was an interesting article recently in the Guardian online blog about writing book reviews and reviewing books in general. Here is the link: http://blogs.guardian.co.uk/books/2008/03/reviewing_the_reviewer.html
What was most interesting, was the comments people left - some of them from renowned authors. One author claimed this might be the nastiest review ever of one of their books: www.sfjohnson.rtsquad.org/wordpress But, they also pointed out that a bad review is better than no review at all. It can often encourage readers to buy the book to see for themselves.
I review books for the Write Away website and I have reviewed books I don’t like. I was very tactful. I am of the opinion that even though I may not like it other people might. Everybody’s tastes are different. I am very honest and do suggest the type of people who may be interested in the book. For an example of me being tactful take a look at: The Teacher's Guide to Grammar and Literacy Matters.