Tips on reviewing
Be honest, otherwise there’s no real point… but remember that someone poured their heart into the book, so be kind too!
Review different elements of the book: the storyline, the language, character development etc. Or for non-fiction, the structure and use of diagrams.
Try to be as specific as you can in your criticism. It’s much more helpful to potential readers and the author if you can say what exactly you liked or disliked, and why.
Say which books that you think are good examples of this genre, and say why so that people know where your opinions are coming from.
If your review was aimed to give the writers some pointers, and they edit their manuscript accordingly, follow up and let them know whether their editing worked.