To find a bok review using JCU Discovery, you simply have to enter the title of the book you are interested in and hit search.
Then you can filter by article, and click on View Full Text to be redirected to the full text of the article.
In Academic Search Premier, as well as all the EBSCO databases, you can search for book reviews by entering the book title as keyword, and then selecting Book Review in the Document Type limit.
You can also select PS Reviews and Products in the drop down menu.
If you want to find a book review in JSTOR, go to the Advanced Search and enter the title of the book for which you want to find the review.
Then select Reviews in the Item Type limit.
The result list will include all review articles where you can see the title of the book(s) reviewed.
LexisNexis can help you locate book reviews published in major world newspapers. You can search for the title of the book you are interested in followed by the keyword "review," or you can select the option in the All News search.