A book review usually consists of the following :
1. Introduction which contains title, type of book, year published, publisher and publisher’s location, writer’s credentials, experience, education and training(for academic books)
2. Analysis and Evaluation of the book consisting of :
a) organization of chapters – whether events are in chronological order or flashbacks, table of contents, index, appendices
b) readability of the book – the kind of vocabulary used, whether illustrations are provided and the complexity of sentences
3. Recommendation about the book, whether it is of any value to an individual or to society, whether the reader should spend his or her money on the book

Some of the popular review sources are :
1. Consumer reports magazine: Many consider it to be the most reliable source of consumer electronic products, but it is not free.
2. CNET : has reviews, price list and also instructions on how to use the particular appliance. Since different models of consumer electronics products are available in Asia and Europe, a non-US buyer may prefer to refer to the regional version.
3. ZDNET, PCMag, PCWorld : for computer and IT related products
4. Viewscore: has a summary of reviews at all popular review websites.
5. Buzzillions : has reviews from verified buyers of products from Staples, RadioShack, REI, Adorama, RitzCamera and other consumer appliances