
Whilst there is no hard and fast, right or wrong, way to review a Book, or a piece of Software, there is a formula that works well.
These reviews appear on the Britgo website, are often taken up by other Go Websites, like AGA, and the publisher might want to use the review too.
So keep in mind that you are writing to a global audience, more than just the British Go Journal.
Look at several existing Book Reviews [1] or Software Reviews [2] to get a feel of the style.
Links:
[1] http://www.britgo.org/bookreviews.html
[2] http://www.britgo.org/softwarereviews.html