The quality and relevance of information in books needs to be evaluated. What to look for:
Authority of the authors, editors - Determine the expertise of the authors, does it match the subject content of their writing?
Scope of Content - Does the content cover your topic to the degree you need? Is it in-depth or does it simply provide an overview with little facts, details, analysis?
Timeliness - Is the content timely for your topic. This is determined somewhat by the time period of your topic.
For help finding book reviews see this research guide:
Look for books and other items in libraries near and far. Most items you find may be requested through Interlibrary Loan.
Google Books is a great resource for finding books and gives a preview of what the book is about and often short sections to view.
There is a link to see if your local library library owns the book and you can see if any of the local libraries have the book!